List of characters in the Camp Half-Blood series
Encyclopedia
This is a list of characters in the Percy Jackson & the Olympians
Percy Jackson & the Olympians
Percy Jackson & the Olympians is a pentalogy of adventure and fantasy fiction books authored by Rick Riordan. The series consists of five books, as well as spin-off titles such as The Demigod Files and Demigods and Monsters. Set in the United States, the books are predominantly based on Greek...

series and in the The Heroes of Olympus
The Heroes of Olympus
The Heroes of Olympus is a fantasy book series written by Rick Riordan and based on Greek and Roman mythology. It is the sequel series to the Percy Jackson & the Olympians pentalogy....

series.

Perseus Jackson

Perseus "Percy" Jackson is a son of Poseidon
Poseidon
Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

 and is the protagonist
Protagonist
A protagonist is the main character of a literary, theatrical, cinematic, or musical narrative, around whom the events of the narrative's plot revolve and with whom the audience is intended to most identify...

 and narrator
Narrator
A narrator is, within any story , the fictional or non-fictional, personal or impersonal entity who tells the story to the audience. When the narrator is also a character within the story, he or she is sometimes known as the viewpoint character. The narrator is one of three entities responsible for...

 of the Percy Jackson and the Olympians series. Being a child of one of the "Big Three" (Zeus, Hades, Poseidon), Percy is the child of the prophecy of the Oracle, which foretells that the next half-blood child of the "Big Three" to reach the age of sixteen would have to make a decision that would mean the destruction or saving of Olympus. However, Percy is not the hero. He has hydrokinetic powers that develop throughout the story, becoming strong enough for him to summon a small hurricane in the Last Olympian. Simply being in water can also heal and energize him, water pressure has no effect on him, and he can see underwater at any depth. In The Battle of The Labyrinth, he gets a pet Hellhound named Mrs. O'Leary. He can also communicate with equestrian animals such as Pegasi and Hippocampi, since his
Poseidon
Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

 father is the god who created horses. He has a sword called Anaklusmos (Riptide) that was a gift from his father Poseidon, delivered to him by Chiron
Chiron
In Greek mythology, Chiron was held to be the superlative centaur among his brethren.-History:Like the satyrs, centaurs were notorious for being wild and lusty, overly indulgent drinkers and carousers, given to violence when intoxicated, and generally uncultured delinquents...

. It can transform into looking like ballpoint pen when capped. It is made of celestial bronze and he can never lose it; it will always return to his pocket. He was technically only selected to go on two of the four quests in the series, the first being the retrieval of Zeus' master thunderbolt. In The Battle of the Labyrinth
The Battle of the Labyrinth
The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

, Percy has to go through the Labyrinth, a big subterranean maze in order to defend the camp against Luke (a son of Hermes and servant of the Titan lord Kronos). The quest in The Sea of Monsters
The Sea of Monsters
The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

was intended to be led by Clarisse (daughter of Ares), but Percy sneaks out of camp because he needs to find Grover
Grover
Grover is a Muppet character on the popular television show Sesame Street. Self-described as lovable, cute and furry, he is a monster who almost never uses contractions when speaking or singing....

, his best friend/protector. In The Titan's Curse
The Titan's Curse
The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

, he is also not selected to go on the quest, but he follows the group because he needed to help Annabeth. Percy has a crush on Annabeth, but his love life has been difficult as a result of Aphrodite's promise she made to him when she met him in the desert. After he helps Zoë, Bianca, Grover, and Thalia, Zoë reluctantly allows him to become the fifth member of their team. In The Last Olympian
The Last Olympian
The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

, he takes on the curse of Achilles, which makes him invincible in all but one point, which is a spot on his back, directly behind his navel, and leads the army against Kronos. In The Lost Hero
The Lost Hero
The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

, Hera/Juno sends Percy to the Roman Camp as an exchange, with no memories of who he is or where he has come from, so that he can learn about them. In The Son of Neptune
The Son of Neptune
The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

Percy has been running from Medusa's sisters for days when he finally reaches Camp Jupiter, having to cross the Little Tiber river, and removing the curse of Achilles. Mars appears and claims Frank Zhang as his son and sends Frank, Percy and Hazel Levesque on a quest to free Thanatos. Percy memories are very weak, he remembers Annabeth as someone who kisses him when he does something stupid, and that she must have kissed him a lot.

Throughout the series, Percy is described as having his father's jet black hair and deep sea green eyes. His strong resemblance to Poseidon is one of the reasons why Medusa wanted to keep him as a statue. When he first arrives at Camp Half Blood, he is described as weak, skinny, and unfit, but eventually becomes more athletic due to his training at Camp Half-Blood. After the events of The Titan's Curse, Percy gains gray streaks in his hair after taking Atlas' burden of holding up the sky. It is not mentioned if the grey streaks disappear over time or not, as they have never been talked about again in the series. According to the UK website, Percy is 5'10" by The Last Olympian.
In the film, Percy is portrayed by Logan Lerman
Logan Lerman
Logan Wade Lerman is an American actor, known for playing the title role in the 2010 fantasy-adventure Percy Jackson & the Olympians: The Lightning Thief. He appeared in commercials in the mid 1990s, before starring in the series Jack & Bobby , and the movies The Butterfly Effect and Hoot...

.

Annabeth Chase



Annabeth Chase is a daughter of Athena
Athena
In Greek mythology, Athena, Athenê, or Athene , also referred to as Pallas Athena/Athene , is the goddess of wisdom, courage, inspiration, civilization, warfare, strength, strategy, the arts, crafts, justice, and skill. Minerva, Athena's Roman incarnation, embodies similar attributes. Athena is...

 and the mortal Frederick Chase. She is shown to be somewhat pompous at first, but quickly warms to Percy during their first quest together. Being a daughter of Athena, she is very intelligent and has a fascination with architecture
Architecture
Architecture is both the process and product of planning, designing and construction. Architectural works, in the material form of buildings, are often perceived as cultural and political symbols and as works of art...

. In battle, she is a skilled enough fighter to hold her ground with Percy, but is superior to him in strategy. She ran away from home when she was seven and met Luke and Thalia, who took her with them to get to Camp Half-Blood. She believes she was in love with Luke, but was drawn to Percy's natural bravery and loyalty. She aids Percy in four of his five quests and is captured in one of them. Though she harbored interest for Luke, she eventually gravitates towards Percy. In "The Last Olympian
The Last Olympian
The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

" she tells Luke that she loved him as a brother, showing that her true love had always been Percy. She kisses him in The Battle of the Labyrinth
The Battle of the Labyrinth
The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

when he was going into Mt. St. Helens and the telekhines attacking them are distracted. Percy also harbors feelings for her and gets jealous when she talks about Luke. She is very protective of her friends, especially Percy, as she felt extremely jealous when Percy befriended Rachel. At the end of the entire series, Percy and Annabeth are together. She owns a Yankee cap that makes the one who wears it invisible, as a 12th birthday gift from her mother. She fights with a knife that was given to her by Luke. At the end of The Battle of the Labyrinth
The Battle of the Labyrinth
The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

Daedalus gives her his computer that was filled with Daedalus's notes and ideas. In The Lost Hero
The Lost Hero
The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

, Annabeth throughout the book is constantly trying to find Percy, organizing search parties and going out trying to find him.
She is the Athena's cabin's councilor. She was originally requested to go on the quest to save Hera, but declines so she can look for Percy.

Annabeth is described as being athletic and having curly blond hair, tan skin, and stormy gray eyes. Annabeth's personality has been implied to very down to earth as she doesn't care about her appearance, always sporting a simple orange camp shirt and jeans. She is described by Percy throughout the first four books to be very "cute" but initially claims her to be very beautiful in the final book of the Percy Jackson Series.
In the film, Annabeth is portrayed by Alexandra Daddario
Alexandra Daddario
Alexandra Daddario is an American actress, known to film audiences as Annabeth Chase in the 2010 film Percy Jackson & the Olympians: The Lightning Thief...

.

Grover Underwood

Grover Underwood is a satyr
Satyr
In Greek mythology, satyrs are a troop of male companions of Pan and Dionysus — "satyresses" were a late invention of poets — that roamed the woods and mountains. In myths they are often associated with pipe-playing....

 and Percy Jackson's friend. He has found the four most powerful demigods of the century: Percy Jackson (son of Poseidon), Thalia Grace (daughter of Zeus), and Nico and Bianca di Angelo (children of Hades). Grover falls in love with a tree nymph called Juniper, who inhibits a juniper bush, from the beginning of the 4th book, The Battle of the Labyrinth. Before Pan's death, the nature god proclaims Grover as the bravest satyr
Satyr
In Greek mythology, satyrs are a troop of male companions of Pan and Dionysus — "satyresses" were a late invention of poets — that roamed the woods and mountains. In myths they are often associated with pipe-playing....

 ever to be and names Grover as his successor to carry on his word to protect the wilderness. The Council of Cloven Elders is angered by this choice. But in The Last Olympian
The Last Olympian
The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

he is chosen as a replacement for Leneus (another Satyr who died in battle) for The Council of Cloven Elders after showing bravery on the battlefield.But in the Lightning Thief trying to get Percy Jackson to Camp Halfblood he got hurt when the minotaur attacked that he passed out and almost died but he got Percy to camp safely.

Grover is a curly brown-haired satyr with brown eyes, white skin, brown chin beard and hairy brown goat legs. His height is 4'5", but later turns 5'9". In the movie: curly brown hair, brown eyes, hairy brown goat legs and brown skin.

In the film, Grover is portrayed by Brandon Jackson
Brandon T. Jackson
Brandon Timothy Jackson is an American stand-up comedian, actor, rapper, writer, and comedian. He is best known for his supporting roles in Roll Bounce, Tropic Thunder, Percy Jackson & the Olympians: The Lightning Thief, Lottery Ticket, and a leading role in Big Mommas: Like Father, Like Son.-Early...

.

Luke Castellan

Luke Castellan is one of Hermes
Hermes
Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

's children and the main demigod antagonist of the series. Though initially the counselor of Cabin 11 and an ally to Percy, he revealed his true nature as a high-ranking member of Kronos's army by attempting to kill Percy at the end of The Lightning Thief
The Lightning Thief
The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

, and on several occasions afterward. He is shown to harbor a great bitterness towards the gods (particularly his father, Hermes) for what he regards as abandonment. His mother had been driven insane upon attempting to impress Hermes by becoming the Oracle, leading to a stressful childhood for Luke. After physically reforming, Kronos does not need Luke's assistance. However, in his duel with Percy on Mount Olympus, striking Annabeth reminds him of his promise to protect her. This temporarily frees him from Kronos's influence. Percy makes his choice to give Luke Annabeth's knife, and Luke, cursed by the broken promise, kills himself by stabbing his own Achilles heel to destroy Kronos. This fulfills the prophecy, with Luke being the foretold hero. And in the Titan's Curse he almost kills Thalia.

In the film, Luke is portrayed by Jake Abel
Jake Abel
Jacob Allen "Jake" Abel is an American actor.Abel was born in Canton, Ohio. His first break was landing a role in the Disney Channel Original Movie Go Figure as Spencer, and later had a recurring role on Threshold, and numerous guest starring roles on such shows as Cold Case and ER...

.

Thalia Grace

Thalia Grace is a daughter of Zeus
Zeus
In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

. She is Jason's older sister and the cousin of Percy Jackson, Bianca and Nico Di Angelo. Grover Underwood was assigned to watch over her when she ran away from home at ten years old. On her journey, she met Luke Castellan and Annabeth Chase. It is said she developed romantic feelings for Luke. They also had brief encounters with the Hunters of Artemis and she was enticed to join them by Zoë Nightshade. When she was twelve, they were all attacked by a herd of monsters and caught by a Cyclops in New York. She was captured, but thanks to Annabeth, was freed. They meet the satyr Grover Underwood on the way. They escaped, but found that the monsters they had briefly escaped had caught up to them. As they reached Half-Blood Hill, Thalia sent Luke, Grover, and Annabeth over the boundary line while she faced the monsters. She sacrificed her life for her friends, and her father, Zeus, took pity on her before she died and transformed her into a white pine tree to prevent her death. She is later brought back to life by the Golden Fleece and joins the quest in The Titan's Curse
The Titan's Curse
The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

where she ultimately joins the Hunters of Artemis, taking the place of Zoë Nightshade. At first, she doesn't get along well with Zoë, but later they grow to respect each other. Thalia's fatal flaw is that she has little resistance to power. In Percy Jackson and the Last Olympian, she arrives with the Hunters to help Percy fight Kronos
Cronus
In Greek mythology, Cronus or Kronos was the leader and the youngest of the first generation of Titans, divine descendants of Gaia, the earth, and Uranus, the sky...

 and his army. She fights alongside Percy, Annabeth and Grover for most of the battle. When they are on their way to confront Luke/Kronos, she gets trapped under Hera
Hera
Hera was the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno. The cow and the peacock were sacred to her...

's statue which was intended for Annabeth and Percy, who were just saved in time by Thalia. She has a younger brother, Jason Grace
Jason Grace
Jason Grace is a fictional character and the protagonist in Rick Riordan's The Heroes of Olympus book series, the sequel to the Percy Jackson & the Olympians series. He first appears in The Lost Hero, the first novel of the series, as a 15 or 16-year-old boy suffering from amnesia...

 who was separated from her when she was 10. In The Lost Hero
The Lost Hero
The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

, this is revealed to be the reason she ran away from home. She meets Jason twice in the book and they develop a close bond. When she and Hera
Hera
Hera was the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno. The cow and the peacock were sacred to her...

 come face to face, they have an argument where Thalia blames her for many incidents in which Hera showed her evil colours. She wears a lot of dark makeup and punk style clothing. She has electric blue eyes and spiky black hair. Thalia's personality is so much like Percy's that according to Annabeth, 'they either could be best friends... or worst enemies.'

Tyson

Tyson is a Cyclops
Cyclops
A cyclops , in Greek mythology and later Roman mythology, was a member of a primordial race of giants, each with a single eye in the middle of his forehead...

, the son of Poseidon
Poseidon
Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

 and his mother is unknown. He is not a demigod, but at Camp Half-Blood he resides in Percy's cabin, and is Percy's half-brother. He first appears in The Sea of Monsters
The Sea of Monsters
The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

as a homeless boy. He is afraid of Grover while Grover is also afraid of him. Also in the "Sea of Monsters" he was Percy's best friend and was always picked on. At the end of the book, he gets to go to work for his father, Poseidon in the Underwater Armory. He also accompanies Annabeth on her quest in The Battle of the Labyrinth
The Battle of the Labyrinth
The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...


In The Son of Neptune
The Son of Neptune
The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

 Tyson is the one who finds Percy's scent. In one of Percy's dreams, Percy tells Tyson to find his harpy friend Ella(who was hiding in the woods in Canada) and bring her to Camp Jupiter. After they meet Percy at Camp Jupiter, Percy noticed how much Ella spoke of Tyson and noticed the two like each other.

Nico di Angelo

Nico di Angelo is Bianca's younger brother, the only known son of Hades. At first Percy assumed Hades broke his agreement with Zeus and Poseidon to not father any more children after World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, but Nico and Bianca were born before the pact was made, and had been placed in the Lotus
Lotus
- Botany :*Lotus , various botanical taxa*Lotus *Lotus Flower, Nelumbo nucifera- Motor cars :*Lotus Cars, a British motor vehicle manufacturer**Team Lotus, a British Formula One racing team that competed between 1954 and 1994...

 Hotel and Casino in Las Vegas, Nevada
Las Vegas, Nevada
Las Vegas is the most populous city in the U.S. state of Nevada and is also the county seat of Clark County, Nevada. Las Vegas is an internationally renowned major resort city for gambling, shopping, and fine dining. The city bills itself as The Entertainment Capital of the World, and is famous...

, a casino that prevents its occupants from aging. This part of Nico and Bianca's background is first hinted at during The Titan's Curse when the gang is forced to enter the Washington Metro
Washington Metro
The Washington Metro, commonly called Metro, and unofficially Metrorail, is the rapid transit system in Washington, D.C., United States, and its surrounding suburbs. It is administered by the Washington Metropolitan Area Transit Authority , which also operates Metrobus service under the Metro name...

 to escape a pursuing helicopter. Nico and Bianca both seem to think that the Metro is very new, as it wasn't there "the last time" they went through Washington DC - a statement that at first seems ususual, given that they are described as being in their teens, and the first segments of the Washington Metro opened in 1976, well before they would have been born.

It wasn't until over seventy years after they were put up (or a few weeks in Lotus time) that they were finally taken from the hotel by one of Hades's agents (in disguise as a lawyer), who delivered them to Washington, D.C.
Washington, D.C.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

 and then to a college in Maine
Maine
Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

. Nico typically wields a three-foot-long Stygian iron sword (as opposed to celestial bronze), which not only kills monsters, but also absorbs their essence, and it has been implied that Stygian iron weapons can only be used by denizens of the Underworld.

Nico has the powers of necromancy (ability to reanimate/talk to/control the dead) limited control over the earth (in The Titan's Curse
The Titan's Curse
The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

 he creates a large fissure at Camp Half-Blood that swallows several skeletal warriors that had been sent on killing Percy) shadow travel, and other talents stemming from his father. For a time, he was Percy's enemy, blaming him for the fact that he had failed to protect Bianca as he had promised, but they eventually became friends. Nico tried multiple times to contact his sister and had difficulty contacting her, even using his dreams. Nico refused to stay at Camp Half-Blood in the fourth book after noting that he was not welcomed there; he compares this to the fact that his father is not welcomed at Olympus. Several months later, he informed Percy of a plan that could lead to defeating Kronos.

In the final book, he convinces Percy to bathe in the River Styx, making him invincible, except for a small spot on his back. Even though bringing him to the Underworld under the pretense of bathing in the Styx to become invincible was a trick to get more information about his mother (whom he had forgotten, as the Fury Alecto dipped him in the River Lethe in the Underworld, in accordance with Hades' orders after his mother's death) this plan did follow through, because Hades was highly cryptic in what he told him, and still threw Percy in jail. Nico later helped him escape (after Percy almost strangles him), and Percy, not sure if he was still angry with Nico for tricking him, tells him to stay behind in the Underworld to convince Hades to help the Olympians in the war. He succeeds at this and later helps wear down Kronos's forces. In the end of the final book Percy asks all the gods and goddess to 'claim' all their children and make sure they have cabins in Camp Half-blood. Nico goes back to the camp and makes a cabin for himself and all the other minor gods and goddess' children.

In The Lost Hero
The Lost Hero
The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

 it is mentioned that he shows up from time to time and that he is also looking for Percy. In The Son of Neptune
The Son of Neptune
The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

 he is revealed to be Hazel's half-brother and claims to not know Percy. He does this because he thinks Percy has to find his own way among the Romans at Camp Jupiter. At the end of the book, it is mentioned that Nico is captured while looking for the Doors of Death, and that he'll be found in Rome. Gaea hints to Hazel that Nico is dead, and Hazel "had a feeling the goddess was telling the truth."

Jason Grace

Jason Grace is the son of Jupiter
Jupiter
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...

, brother of Thalia Grace and one of the main protagonists of The Heroes of Olympus
The Heroes of Olympus
The Heroes of Olympus is a fantasy book series written by Rick Riordan and based on Greek and Roman mythology. It is the sequel series to the Percy Jackson & the Olympians pentalogy....

series. He is from a Roman equivalent of Camp Half-Blood called Camp Jupiter that consists of demigod
Demigod
The term "demigod" , meaning "half-god", is commonly used to describe mythological figures whose one parent was a god and whose other parent was human; as such, demigods are human-god hybrids...

s born of the Roman aspect of gods. His memory was stolen by the goddess Hera
Hera
Hera was the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno. The cow and the peacock were sacred to her...

/Juno
Juno (mythology)
Juno is an ancient Roman goddess, the protector and special counselor of the state. She is a daughter of Saturn and sister of the chief god Jupiter and the mother of Mars and Vulcan. Juno also looked after the women of Rome. Her Greek equivalent is Hera...

. He and Percy Jackson have exchanged places (both involuntarily), because they are the respective leaders at both camps. Jason tries to recall who he is and begins to remember some pieces of his former life. He often shows similar traits with Percy.

Jason has tidily cropped golden blond hair, bright blue eyes, and a scar on the corner of his lip (according to Thalia, he tried to eat a stapler when he was two). He is of average height with athletic build, having muscular tanned arms. He has an intimidating tattoo burned under his forearm: 12 straight lines like a bar code with an eagle (the symbol of Zeus/Jupiter) and the letters "SPQR" over the lines. Jason doesn't remember where he got the marks, but he believes he got them from Camp Jupiter.

Piper McLean

Piper McLean is the daughter of Aphrodite
Aphrodite
Aphrodite is the Greek goddess of love, beauty, pleasure, and procreation.Her Roman equivalent is the goddess .Historically, her cult in Greece was imported from, or influenced by, the cult of Astarte in Phoenicia....

 and friend of Jason. At the beginning of The Lost Hero
The Lost Hero
The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

she believes that Jason is her boyfriend due to the Mist. After learning that her memories of Jason are false, she still harbors feelings for him. Unlike most children of Aphrodite, Piper is tomboyish and not concerned with her appearance or fashion. Her father is Tristan McLean, a famous Cherokee actor. Despite being labeled a "bad kid" at the Wilderness School, her "bad" actions are all for her dad's attentions. She uses charmspeak, a rare ability of Aphrodite's children, to convince people to give her things (such as a BMW convertable at a dealership), later getting in trouble for "stealing." Refusing to give in to her cabin's head counselor Drew's bullying, she stands up for her brothers and sisters and challenges Drew for the position, becoming the head counselor.

Like all children of Aphrodite, Piper is described as very beautiful. She has choppy and uneven chocolate brown hair and eyes that change color like a "kaleidoscope" (blue to green to brown). Piper is half-Cherokee from her father's side. She has a slim build and an average height.

Leo Valdez

Leo Valdez is the son of Hephaestus
Hephaestus
Hephaestus was a Greek god whose Roman equivalent was Vulcan. He is the son of Zeus and Hera, the King and Queen of the Gods - or else, according to some accounts, of Hera alone. He was the god of technology, blacksmiths, craftsmen, artisans, sculptors, metals, metallurgy, fire and volcanoes...

,and a close friend of Jason Grace. At the beginning of The Lost Hero
The Lost Hero
The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

, the Mist has made him believe Jason is his best friend. Later they do actually become best friends. Leo also has the ability to touch and produce fire, a skill that no other son of Hephaestus has had in four hundred years. As a child of Hephaestus, he is also an excellent mechanic. He discovers a secret bunker hidden in the forest and finds a magic tool belt in the bunker which grants him most things he wants (except anything too large or magical). He uses the bunker and tool belt to repair the bronze dragon that was previously running wild in the camp's woods, naming it Festus after his initial mispronunciation of his father's name. When he visits Boreas with Jason and Piper, he is left with 'Cal' because fire and ice do not mix well. He is a joker and cannot keep his hands still, and also falls quickly for girls. He even uses the tool belt to summon breath mints in order to try and woo Khione, goddess of snow and daughter of Boreas. But she ends up being evil so he falls for Jason's sister, Thalia.

In the novel Leo is described as looking like a "Latino Santa's elf" with curly black hair, dark brown eyes, pointy ears, a cheerful babyish face, and a mischievous smile. He is described as being of normal height with a slim build.

In The Son of Neptune
The Son of Neptune
The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

, Hazel Levesque and Percy Jackson both agree that he is an exact twin to Sammy Valdez, Hazel's former boyfriend

Hazel Levesque

Hazel Levesque is the daughter of Pluto
Pluto
Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System and the tenth-most-massive body observed directly orbiting the Sun...

, and a friend of Frank Zhang. She appears in The Son of Neptune
The Son of Neptune
The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

at Camp Jupiter, the camp for Roman demigods. She grew up in New Orleans, where her mother had a gris-gris shop. She would find precious metals/gems all the time, however anyone who took them suffered a terrible misfortune. Her mother took her to Alaska where Gaia used her to bring Alcyoneus, back to life. Hazel's mother changed her mind about helping Gaea and died. Hazel sacrificed herself to delay Alcyoneus' rebirth. She died in 1942, and at her judgement she gave up the Fields of Elysium to save her mother from punishment, sending them both to Asphodel instead.
Hazel has some (Louisiana) Creole blood on her mothers side, and she knows a small amount of French.

When Thanatos was first captured Nico di Angelo went looking for his sister, Bianca, but she was already gone, having chosen to be reborn. Nico gave Hazel a second chance at life, helping her escape the Underworld and taking her to Camp Jupiter. Hazel journeys with Frank and Percy to free Thanatos. She tames Arion, a violent horse that eats precious metals.

Leo Valdez, from The Lost Hero, looks exactly like Hazel's boyfriend, Sammy Valdez, in her past life.

Pluto/Hades is hinted to want her to have a second chance as Thanatos says when asked, that she is not on his list of escaped souls.

Hazel is described as having cocoa-colored skin, and her eyes, as described by Percy, are a 'luminous gold'. Frank, who has an obvious crush on her, describes her hair as 'cinnamon toast' colored, and that she is tiny compared to him.

Frank Zhang

Frank Zhang is the son of Mars
Mars
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

, and a friend of Hazel Levesque. He appears in The Son of Neptune
The Son of Neptune
The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

as a camper at Camp Jupiter. His family is Chinese and his mother recently died in Afhganistan. When he was a child, Juno came to their family homestead in the form of smoke saying that the wood creating the smoke is now connected to Frank's life and if it ever burns out he will die to. He later uses the stick to free Thanatos from his ice chains. Luckily, a small portion of the stick wasn't burned and he was still alive.

He is the descendant of Periclymenus
Periclymenus
In Greek mythology, the name Periclymenus may refer to:*A son of Neleus and Chloris. He was one of the Argonauts. Poseidon gave him the ability to shapeshift into various animals. He was killed by Heracles at Pylos, although he tried to escape in the form of an eagle. His offspring were Erginus...

, the grandson of Neptune who was granted the power to shapeshift. Eventually his descendants where sent to China for slavery. Many years later, their family migrated to Canada where Frank was eventually born. Later, he transformed into an elephant to drag Alcyoneus out of his territory and successfully killed him with Hazel.

He expected himself to be the son of Apollo due to his archery skills.

He was described as having a babyish face with chubby cheeks to go with it with black military cut. He has a big frame and is stoutly built.

Olympian gods

  • Zeus
    Zeus
    In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

    /Jupiter
    Jupiter (mythology)
    In ancient Roman religion and myth, Jupiter or Jove is the king of the gods, and the god of the sky and thunder. He is the equivalent of Zeus in the Greek pantheon....

    - The King of the Gods, God of the Sky, Zeus is brother to Poseidon and Hades, uncle to Percy, Nico and Bianca, father of Thalia, son of Kronos. His Roman counterpart is Jupiter, brother to Pluto
    Pluto
    Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System and the tenth-most-massive body observed directly orbiting the Sun...

     and Neptune
    Neptune
    Neptune is the eighth and farthest planet from the Sun in the Solar System. Named for the Roman god of the sea, it is the fourth-largest planet by diameter and the third largest by mass. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times...

    , father to Jason, and uncle to Hazel. He is a principal character in the first book but is a minor one in the next four. His cabin is Cabin 1. Poseidon calls Zeus dramatic, saying that he might do better as the God of Theater. His symbol of power is his Master Bolt. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , Zeus (under the influence of Khione) forbids contact between gods and mortals and closes down Olympus. Despite this, Zeus indirectly aids the demigods several times on their quest, such as answering his son's prayer for aid against Enceladus.

  • Hera
    Hera
    Hera was the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno. The cow and the peacock were sacred to her...

    /Juno
    Juno (mythology)
    Juno is an ancient Roman goddess, the protector and special counselor of the state. She is a daughter of Saturn and sister of the chief god Jupiter and the mother of Mars and Vulcan. Juno also looked after the women of Rome. Her Greek equivalent is Hera...

    - The Queen of the Gods and the Goddess of Marriage. Hera plays a small role in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    but is one of the gods who help Percy and the others in their quest in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . At the end of the book, Annabeth and Percy offend her because she did not care that Luke was gone or that Daedalus
    Daedalus
    In Greek mythology, Daedalus was a skillful craftsman and artisan.-Family:...

     and Pan were both dead. She especially dislikes Annabeth and curses her like how Ares
    Ares
    Ares is the Greek god of war. He is one of the Twelve Olympians, and the son of Zeus and Hera. In Greek literature, he often represents the physical or violent aspect of war, in contrast to the armored Athena, whose functions as a goddess of intelligence include military strategy and...

     cursed Percy in the 1st book. She thought Luke, Pan and Daedalus were better off gone. Cabin 2 at Camp Half-Blood is dedicated to her, but is perpetually empty; as the goddess of marriage, she has not given birth to any demigods. In spite of this, Hera meddles with the affairs of many demigods. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    she has a minor role where she congratulates Percy on his victory rather disdainfully and says that she would have to let him and Annabeth live a little longer. She returns as Juno in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    in which Percy Jackson has disappeared. She has been kidnapped by Gaia
    Gaia (mythology)
    Gaia was the primordial Earth-goddess in ancient Greek religion. Gaia was the great mother of all: the heavenly gods and Titans were descended from her union with Uranus , the sea-gods from her union with Pontus , the Giants from her mating with Tartarus and mortal creatures were sprung or born...

     and contacts Jason Grace
    Jason Grace
    Jason Grace is a fictional character and the protagonist in Rick Riordan's The Heroes of Olympus book series, the sequel to the Percy Jackson & the Olympians series. He first appears in The Lost Hero, the first novel of the series, as a 15 or 16-year-old boy suffering from amnesia...

    , the new protagonist and asks him to help her. It is then revealed that as Juno, she snuck out of Olympus and exchanged Percy and Jason to try and unite the Roman and Greek demigods. She goes against the wishes of Zeus in this regard because she wants to save everyone – gods, demigods and mortals from the new evil. Juno also admits that she is bitter towards heroes and demigods because she does not have any of her own. Juno, Hera's Roman counterpart, is more warrior-like and more disciplined and rebellious. Juno even states that Hera would not have disobeyed Zeus, but Juno would. In The Son Of Neptune, Juno is disguised as an old lady and gives Percy a test to either save her and possibly save him or to save himself and forget the rest of the world.

  • Aphrodite
    Aphrodite
    Aphrodite is the Greek goddess of love, beauty, pleasure, and procreation.Her Roman equivalent is the goddess .Historically, her cult in Greece was imported from, or influenced by, the cult of Astarte in Phoenicia....

    /Venus
    Venus (mythology)
    Venus is a Roman goddess principally associated with love, beauty, sex,sexual seduction and fertility, who played a key role in many Roman religious festivals and myths...

    - The Goddess of Love, Beauty, Lust, etc. She is mentioned in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    and appears briefly in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . Her children (mostly girls) live in Cabin 10. Her appearance changes as Percy looks at her, matching every female he has ever had a crush on (one being Annabeth). She encourages Percy to pursue a quest for true love. She is shown to have interest in Percy's feelings towards Annabeth and promises to make Percy's love life hard. She appears again at the Council of the Gods and votes to let Percy live. Aphrodite is also the last child of Ouranos. Aphrodite is also the mother of Piper McLean
    Piper McLean
    Piper McLean is a fictional character and the deuteragonist in Rick Riordan's The Heroes of Olympus book series, the sequel to the Percy Jackson & the Olympians series. She first appears in The Lost Hero, the first novel of the series, as a fifteen year-old undetermined demigod who attends the...

    , a main character in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , and changes her daughter's tomboyish appearance twice to make her more beautiful.

  • Apollo
    Apollo
    Apollo is one of the most important and complex of the Olympian deities in Greek and Roman mythology...

    - The God of the Sun, Poetry, and the Oracle. The campers in Cabin 7 are his children. He drives a flying red convertible, a Maserati Spyder, that glows brightly like the sun. He appears to be about 18 or 19 years old and has sandy colored hair and dazzling white teeth. Apollo wears Ray-Ban sunglasses and sports an iPod
    IPod
    iPod is a line of portable media players created and marketed by Apple Inc. The product line-up currently consists of the hard drive-based iPod Classic, the touchscreen iPod Touch, the compact iPod Nano, and the ultra-compact iPod Shuffle...

    . Percy notes that he looks similar to Luke, but less evil. He also loves to recite poetry, especially haiku
    Haiku
    ' , plural haiku, is a very short form of Japanese poetry typically characterised by three qualities:* The essence of haiku is "cutting"...

    s after he supposedly visited Japan. Percy describes them as so bad that he would rather be shot by an arrow than listen to one, but Zoë says his limerick
    Limerick (poetry)
    A limerick is a kind of a witty, humorous, or nonsense poem, especially one in five-line or meter with a strict rhyme scheme , which is sometimes obscene with humorous intent. The form can be found in England as of the early years of the 18th century...

     days were much worse. Apollo helps Percy and his friends by flying them to Camp Half-Blood in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    and later helping them after they got off of a train while being disguised as a homeless man. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , he heals Annabeth's broken arm after she was thrown into her mother's throne. At the end of the war between the Titans and the gods, Rachel is certified as the new Oracle by Apollo. His name is both Greek and Roman.

  • Ares
    Ares
    Ares is the Greek god of war. He is one of the Twelve Olympians, and the son of Zeus and Hera. In Greek literature, he often represents the physical or violent aspect of war, in contrast to the armored Athena, whose functions as a goddess of intelligence include military strategy and...

    /Mars
    Mars (mythology)
    Mars was the Roman god of war and also an agricultural guardian, a combination characteristic of early Rome. He was second in importance only to Jupiter, and he was the most prominent of the military gods worshipped by the Roman legions...

    - The God of War and Bloodlust. His children are the campers in Cabin 5. He first encounters Percy in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    . Ares drives a large, black, Harley-Davidson motorcycle with a flame-pattern paint job, a boar themed antenna, handles, boars head shaped red headlight and a leather seat made from human skin. He wears red wraparound sunglasses that cover his eyes, which are flames, a bulletproof vest, combat boots, black leather biker clothes, and a black leather duster. His face is covered with scars from many fights. Once, Ares sends Percy, Grover and Annabeth to retrieve his shield, which he left behind after a date with Aphrodite
    Aphrodite
    Aphrodite is the Greek goddess of love, beauty, pleasure, and procreation.Her Roman equivalent is the goddess .Historically, her cult in Greece was imported from, or influenced by, the cult of Astarte in Phoenicia....

    . They travel to a Tunnel of Love
    Tunnel of love (amusement ride)
    The Tunnel of Love is a type of amusement ride commonly found at carnivals and amusement parks. It is similar to a dark ride in that riders are taken through dark passages, in this case in pairs. There are two major themes: a relaxing romantic ride encouraging the couple to cuddle, or a spooky...

    , which ends up being a trap set by Hephaestus
    Hephaestus
    Hephaestus was a Greek god whose Roman equivalent was Vulcan. He is the son of Zeus and Hera, the King and Queen of the Gods - or else, according to some accounts, of Hera alone. He was the god of technology, blacksmiths, craftsmen, artisans, sculptors, metals, metallurgy, fire and volcanoes...

    . He intercepts Zeus's master bolt from Luke in The Lightning Thief and gives Percy a backpack containing it. He wants to cause discord among Zeus, Poseidon and Hades. Later, he is overpowered by Percy in a duel. He curses Percy that his sword will fail him in battle in a certain fight and departs (which takes effect during Percy's fight with Atlas). Ares returns with minor roles in The Sea of Monsters
    The Sea of Monsters
    The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

    and The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . He is seen at the end of The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    after giving Clarisse a blessing during battle and is very proud of her.

  • Artemis
    Artemis
    Artemis was one of the most widely venerated of the Ancient Greek deities. Her Roman equivalent is Diana. Some scholars believe that the name and indeed the goddess herself was originally pre-Greek. Homer refers to her as Artemis Agrotera, Potnia Theron: "Artemis of the wildland, Mistress of Animals"...

    /Diana
    Diana (mythology)
    In Roman mythology, Diana was the goddess of the hunt and moon and birthing, being associated with wild animals and woodland, and having the power to talk to and control animals. She was equated with the Greek goddess Artemis, though she had an independent origin in Italy...

    - The Goddess of the Moon, Wild Animals, and the Hunt. She is the twin sister of Apollo. Cabin 8 at Camp Half-Blood is dedicated to her, though it is unoccupied, except for the rare visits when her group of huntresses stays at the camp, such as in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . She is a maiden goddess and bears no demigod children. She has a prominent role in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . Artemis appears to be about 12 years old. She has auburn
    Auburn (color)
    Auburn may be described as hair that is of a reddish-brown color. The word "auburn" comes from the Old French word alborne, which meant blond, coming from Latin word alburnus . The first recorded use of auburn in English was in 1430...

     hair and silvery-yellow eyes, the color of the full moon. Artemis leads a group of teenaged girls known as the Hunters of Artemis. The Hunters pledge to give up love in exchange for immortality. The Hunters never grow up and can only die if they are killed in battle or break their oath. Artemis leaves the Hunters to pursue a monster that has the potential to destroy Olympus. She is trapped by Atlas and is forced to hold up the sky. She is rescued by Percy who holds the sky for her so she can fight Atlas. Artemis and Percy trick Atlas into holding the sky again. Artemis transforms Zoë into a constellation
    Constellation
    In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....

     after she is killed in battle. She seems to like Percy, saying that he's okay for a boy, and later refers to him as a man. She speaks up for Percy, Annabeth and Thalia at the Council of the Gods and votes for Percy to live. Thalia joins her hunt at the end of The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    , preventing her from fulfilling the Oracle's prophecy. Artemis did not follow Zeus' order to not have contact with mortals by still communicating with her Hunters. Thalia states, "Artemis follows her own rules," even though she does this without Zeus' knowledge. She sent Thalia to find Jason, Thalia's long-lost brother.

  • Athena
    Athena
    In Greek mythology, Athena, Athenê, or Athene , also referred to as Pallas Athena/Athene , is the goddess of wisdom, courage, inspiration, civilization, warfare, strength, strategy, the arts, crafts, justice, and skill. Minerva, Athena's Roman incarnation, embodies similar attributes. Athena is...

    /Minerva
    Minerva
    Minerva was the Roman goddess whom Romans from the 2nd century BC onwards equated with the Greek goddess Athena. She was the virgin goddess of poetry, medicine, wisdom, commerce, weaving, crafts, magic...

    - The Goddess of Wisdom and Battle Strategy. She first appears in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    , where she is shown to dislike Percy and his relationship with Athena's daughter, Annabeth. Athena is described as being beautiful but also serious and foreboding. She has intense grey eyes, as do almost all of her children who reside in Cabin 6. In The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    , she has black hair, but in other books, she is depicted as having blonde hair, like her children. Athena considers Percy to be very dangerous as he has the potential of fulfilling the Prophecy that a child of one of the Big Three will destroy Olympus. She advises Percy that wise counsel is not always the most popular, and cautions him about his fatal flaw. She also votes not to let Percy live. Percy considers Athena one of the most dangerous beings he has encountered, noting that because of her calculating intelligence, her plans rarely fail.

  • Demeter
    Demeter
    In Greek mythology, Demeter is the goddess of the harvest, who presided over grains, the fertility of the earth, and the seasons . Her common surnames are Sito as the giver of food or corn/grain and Thesmophoros as a mark of the civilized existence of agricultural society...

    /Ceres
    Ceres (mythology)
    In ancient Roman religion, Ceres was a goddess of agriculture, grain crops, fertility and motherly relationships. She was originally the central deity in Rome's so-called plebeian or Aventine Triad, then was paired with her daughter Proserpina in what Romans described as "the Greek rites of Ceres"...

    - The Goddess of the Harvest and Agriculture. She is first mentioned in The Sea of Monsters
    The Sea of Monsters
    The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

    , when Hermes is talking to Percy about the quest. She was also one of the goddesses who voted to keep Percy alive in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . Demeter made three brief appearances along with her daughter Persephone in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , notably when she participates in the battle against the Titans. Her children reside in Cabin 4.

  • Dionysus/Bacchus
    Dionysus
    Dionysus was the god of the grape harvest, winemaking and wine, of ritual madness and ecstasy in Greek mythology. His name in Linear B tablets shows he was worshipped from c. 1500—1100 BC by Mycenean Greeks: other traces of Dionysian-type cult have been found in ancient Minoan Crete...

    - The God of Wine
    Wine
    Wine is an alcoholic beverage, made of fermented fruit juice, usually from grapes. The natural chemical balance of grapes lets them ferment without the addition of sugars, acids, enzymes, or other nutrients. Grape wine is produced by fermenting crushed grapes using various types of yeast. Yeast...

     and Madness. He is Percy's cousin and the father of Castor and Pollux
    Castor and Pollux
    In Greek and Roman mythology, Castor and Pollux or Polydeuces were twin brothers, together known as the Dioscuri . Their mother was Leda, but Castor was the mortal son of Tyndareus, king of Sparta, and Pollux the divine son of Zeus, who visited Leda in the guise of a swan...

    . He is the director of Camp Half-Blood where he was sent by his father Zeus
    Zeus
    In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

     for chasing an off-limits nymph
    Nymph
    A nymph in Greek mythology is a female minor nature deity typically associated with a particular location or landform. Different from gods, nymphs are generally regarded as divine spirits who animate nature, and are usually depicted as beautiful, young nubile maidens who love to dance and sing;...

     though he is married. At Camp Half Blood, he is known as "Mr. D." He is shown to hate his job and have a low opinion of demigods stemming from Theseus' abandonment of Ariadne, but he has to remain at Camp Half-Blood for another fifty years (his punishment used to be 100 years, then Zeus shortened it). His children live in Cabin 12. He can be seen playing with the satyr
    Satyr
    In Greek mythology, satyrs are a troop of male companions of Pan and Dionysus — "satyresses" were a late invention of poets — that roamed the woods and mountains. In myths they are often associated with pipe-playing....

    s in camp. He appears in all the books. In The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    , he goes out to search for the minor gods and returns at the end of the book. He rarely bothers to call the campers by their proper names, making a point of calling Percy Jackson names such as 'Peter Johnson', 'Perry Johannson', or 'Pierre Jorgenson' throughout the series. He also calls Annabeth 'Annie Bell' or 'that Anne girl', regardless of the fact that she has been in Camp Half-Blood since she was seven years old. Though he has said that Percy "always manages to annoy him," he has saved Percy's and Annabeth's life several times. His son Dakota at Camp Jupiter is addicted to red Kool-Aid.

  • Hades
    Hades
    Hades , Hadēs, originally , Haidēs or , Aidēs , meaning "the unseen") was the ancient Greek god of the underworld. The genitive , Haidou, was an elision to denote locality: "[the house/dominion] of Hades". Eventually, the nominative came to designate the abode of the dead.In Greek mythology, Hades...

    /Pluto
    Pluto (mythology)
    In ancient Greek religion and myth, Pluto was a name for the ruler of the underworld; the god was also known as Hades, a name for the underworld itself...

    - The God of the Underworld, Hades is brother to Poseidon and Zeus uncle to Percy, father of Nico and Bianca di Angelo, son of Kronos. He is the husband of his niece Persephone
    Persephone
    In Greek mythology, Persephone , also called Kore , is the daughter of Zeus and the harvest-goddess Demeter, and queen of the underworld; she was abducted by Hades, the god-king of the underworld....

    . Percy first encounters him in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    on his quest to find and return Zeus's master bolt. In The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    story "The Sword of Hades," he discovers that Persephone had the Sword of Hades made for him which was made from Stygian Iron and one of the Keys of Death. In exchange for having the sword returned, Percy made Hades swear on the River Styx not to use the weapon against the gods. Afterwards, Hades agreed and left angrily now realizing that Persephone disobeyed him and made the Sword of Hades against his wishes. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , Hades traps Percy when Nico leads him to the Underworld palace. He plans to put him in the dungeon until Nico turns sixteen, so Nico can fulfill the prophecy. He appears again with Persephone and Demeter
    Demeter
    In Greek mythology, Demeter is the goddess of the harvest, who presided over grains, the fertility of the earth, and the seasons . Her common surnames are Sito as the giver of food or corn/grain and Thesmophoros as a mark of the civilized existence of agricultural society...

     to save Olympus
    Mount Olympus
    Mount Olympus is the highest mountain in Greece, located on the border between Thessaly and Macedonia, about 100 kilometres away from Thessaloniki, Greece's second largest city. Mount Olympus has 52 peaks. The highest peak Mytikas, meaning "nose", rises to 2,917 metres...

    . After the war, Hades, along with the minor gods, is given a cabin in Camp Half-Blood

  • Hephaestus
    Hephaestus
    Hephaestus was a Greek god whose Roman equivalent was Vulcan. He is the son of Zeus and Hera, the King and Queen of the Gods - or else, according to some accounts, of Hera alone. He was the god of technology, blacksmiths, craftsmen, artisans, sculptors, metals, metallurgy, fire and volcanoes...

    /Vulcan
    Vulcan (mythology)
    Vulcan , aka Mulciber, is the god of beneficial and hindering fire, including the fire of volcanoes in ancient Roman religion and Roman Neopaganism. Vulcan is usually depicted with a thunderbolt. He is known as Sethlans in Etruscan mythology...

    - The Gods' Blacksmith
    Blacksmith
    A blacksmith is a person who creates objects from wrought iron or steel by forging the metal; that is, by using tools to hammer, bend, and cut...

     and God of Fire. He appears as a minor character in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    and as a major one in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    where he helps Percy numerous times. His children reside in Cabin 9. He is the father of Charles Beckendorf and Leo Valdez
    Leo Valdez
    Leo Valdez is a fictional character in Rick Riordan's The Heroes of Olympus series of novels. He first appears as one of the three protagonists in The Lost Hero where he is a fifteen year-old demigod of indeterminate parentage who attends the Wilderness School, a boarding school for "bad...

    . He was thrown off of Mount Olympus
    Mount Olympus
    Mount Olympus is the highest mountain in Greece, located on the border between Thessaly and Macedonia, about 100 kilometres away from Thessaloniki, Greece's second largest city. Mount Olympus has 52 peaks. The highest peak Mytikas, meaning "nose", rises to 2,917 metres...

     when he was born because Hera thought he was hideous and wanted a "perfect" family, though Hera denies it. Hephaestus says that Hera likes telling the story that Zeus threw him off the cliff because "it makes her seem more likable." He defied Zeus' rule in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    and spoke to his son where he mentioned that he was displeased that Percy declined Zeus' offer for immortality following Kronos' defeat. He also took the head of Festus to Bunker 9 for Leo and commanded his children there to build the Argo II with Festus' head as the figurehead.

  • Hermes
    Hermes
    Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

    /Mercury
    Mercury (mythology)
    Mercury was a messenger who wore winged sandals, and a god of trade, the son of Maia Maiestas and Jupiter in Roman mythology. His name is related to the Latin word merx , mercari , and merces...

    - The Messenger of the Gods and the God of Travelers, Communication, and Thieves. All of his children stay in Cabin 11. He has nearly no role in the first book but is a significant character in the second book where he helps Percy by giving him a flask full of air, backpacks, and his special multi-vitamins, hoping that he will be able to rescue his son, Luke, who had joined the Titans
    Titan (mythology)
    In Greek mythology, the Titans were a race of powerful deities, descendants of Gaia and Uranus, that ruled during the legendary Golden Age....

    . He is also mentioned briefly in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . He is bitter about Luke's situation and gets angry at Annabeth in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    for not saving him when she had the choice.

  • Hestia
    Hestia
    In Greek mythology Hestia , first daughter of Cronus and Rhea , is the virgin goddess of the hearth, architecture, and of the right ordering of domesticity and the family. She received the first offering at every sacrifice in the household. In the public domain, the hearth of the prytaneum...

    /Vesta
    Vesta (mythology)
    Vesta was the virgin goddess of the hearth, home, and family in Roman religion. Vesta's presence was symbolized by the sacred fire that burned at her hearth and temples...

    - The Goddess of Hearth and Home. She first appears as a young girl, about 8 years old, who wears a simple brown dress and scarf. Percy sees her when he enters Camp Half-Blood for the first time, but does not speak to her. Percy and Nico encounter her in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    when she gives them food. She has glowing eyes that remind Percy of a cozy fire. Hestia tends to the hearth in Olympus while the other gods battle Typhon
    Typhon
    Typhon , also Typhoeus , Typhaon or Typhos was the last son of Gaia, fathered by Tartarus, and the most deadly monster of Greek mythology. He was known as the "Father of all monsters"; his wife Echidna was likewise the "Mother of All Monsters."Typhon was described in pseudo-Apollodorus,...

    . Hestia gave up her throne for Dionysus
    Dionysus
    Dionysus was the god of the grape harvest, winemaking and wine, of ritual madness and ecstasy in Greek mythology. His name in Linear B tablets shows he was worshipped from c. 1500—1100 BC by Mycenean Greeks: other traces of Dionysian-type cult have been found in ancient Minoan Crete...

     in order to prevent a civil war among the Olympians. She explains to Percy that one of the greatest powers is to yield in order to retain peace. Percy offers Pandora's jar to Hestia, as she is the Last Olympian and Hope survives best at the hearth. Hestia accepts, preventing Percy from being tempted to open it. She later helps Percy when he battles Kronos by making her hearth painfully hot for Kronos when he reaches to get his scythe when it fell into the flames. When Percy looks into her eyes, he can sometimes see the past or the future, like what happened before Annabeth, Thalia and Luke came to Camp Half-Blood.

  • Poseidon
    Poseidon
    Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

    /Neptune
    Neptune (mythology)
    Neptune was the god of water and the sea in Roman mythology and religion. He is analogous with, but not identical to, the Greek god Poseidon. In the Greek-influenced tradition, Neptune was the brother of Jupiter and Pluto, each of them presiding over one of the three realms of the universe,...

    - The God of the Sea, Earthquakes, Storms, and Hurricanes, son of Kronos
    Cronus
    In Greek mythology, Cronus or Kronos was the leader and the youngest of the first generation of Titans, divine descendants of Gaia, the earth, and Uranus, the sky...

     brother of Hades and Zeus, uncle of Thalia Grace and Nico and Bianca di Angelo, and father of Percy. He is the creator of horses. Poseidon's children (Percy's half-siblings) reside in Cabin 3. In The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    , he is suspected of having stolen Zeus's master bolt, but Percy proves the claim false. He appears as a minor character in the next three books. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , Percy falls unconscious in the ocean and lands at Poseidon's castle. Poseidon is at war with Oceanus
    Oceanus
    Oceanus ; , Ōkeanós) was a pseudo-geographical feature in classical antiquity, believed by the ancient Greeks and Romans to be the world-ocean, an enormous river encircling the world....

    , the Titan god of the ocean, and makes Percy go back to camp instead of helping him. He is one of the few gods that does not go and help in the effort to defeat Typhon
    Typhon
    Typhon , also Typhoeus , Typhaon or Typhos was the last son of Gaia, fathered by Tartarus, and the most deadly monster of Greek mythology. He was known as the "Father of all monsters"; his wife Echidna was likewise the "Mother of All Monsters."Typhon was described in pseudo-Apollodorus,...

     until Percy tells him that the only way to win is to abandon the sea and fight Typhon. His symbol of power is the trident.

Minor gods

  • Aeolus
    Aeolus
    Aeolus was the ruler of the winds in Greek mythology. In fact this name was shared by three mythic characters. These three personages are often difficult to tell apart, and even the ancient mythographers appear to have been perplexed about which Aeolus was which...

    - The custodian of the Four Winds. He never made an appearance, but they were mentioned in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . The winds he sent made it hard for the Titan army to hit Olympus by air. Consequently, it also made it harder for Pegasi to fly. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , Aeolus is shown to have gone crazy filling out the gods' weather requests and wants Zeus to make him a god.

  • Amphitrite
    Amphitrite
    In ancient Greek mythology, Amphitrite was a sea-goddess and wife of Poseidon. Under the influence of the Olympian pantheon, she became merely the consort of Poseidon, and was further diminished by poets to a symbolic representation of the sea...

    - The Queen of the Seas, wife of Poseidon, and daughter of Oceanus. In The Last Olympian, Amphitrite alongside Triton is seen talking strategy with her husband Poseidon in the throne room of their ocean floor palace. Percy Jackson joins them and Amphitrite treats him coldly as he is a reminder of Poseidon's unfaithfulness. Percy expects nothing else and feels sorry for her as she does not have a faithful husband. She is worried about how her father is attacking and how Poseidon is losing power to the Titan of the Sea. Amphitrite is a beautiful goddess, with flowing black hair and small horns like crab claws.

  • Boreas
    Anemoi
    In Greek mythology, the Anemoi were Greek wind gods who were each ascribed a cardinal direction from which their respective winds came , and were each associated with various seasons and weather conditions...

    - The God of the North Wind. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , Jason, Piper, and Leo meet him in his palace when they come to him for help.

  • Deimos
    Deimos (mythology)
    In Greek mythology, Deimos was the personification of terror.He was the son of Ares and Aphrodite. He is the twin brother of Phobos and the goddess Enyo who accompanied Ares into battle, as well as his father's attendants, Trembling, Fear, Dread, and Panic...

    - The God of Terror and the son of Ares. He appears in the "Percy Jackson and the Stolen Chariot" story in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    . Deimos and his brother Phobos
    Phobos (mythology)
    Phobos is the personification of horror in Greek mythology. He is the offspring of Ares and Aphrodite. He was known for accompanying Ares into battle along with his brother, Deimos, the goddess Enyo, and his father’s attendants. Timor is his Roman equivalent...

     steal Ares' war chariot from Clarisse. Percy and Clarisse have to get it back to Ares before sunset. On the way, Deimos comes in front of the ferry that Percy and Clarisse are on while riding a sea serpent
    Sea serpent
    A sea serpent or sea dragon is a type of sea monster either wholly or partly serpentine.Sightings of sea serpents have been reported for hundreds of years, and continue to be claimed today. Cryptozoologist Bruce Champagne identified more than 1,200 purported sea serpent sightings...

    . He comes back later in the zoo, terrorizing Clarisse by shape-shifting into Ares and yelling at her. Clarisse deduces his true identity and defeats him.

  • East River - The River God who is the embodiment of the East River
    East River
    The East River is a tidal strait in New York City. It connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island from the island of Manhattan and the Bronx on the North American mainland...

    . He only appears in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . He dislikes Percy and the Hudson River
    Hudson River
    The Hudson is a river that flows from north to south through eastern New York. The highest official source is at Lake Tear of the Clouds, on the slopes of Mount Marcy in the Adirondack Mountains. The river itself officially begins in Henderson Lake in Newcomb, New York...

    . Percy asks him to sink all of the Titan ships that come in his river, and splits the sand dollar
    Sand dollar
    The term Sand dollar refers to species of extremely flattened, burrowing echinoids belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are known as sea biscuits...

     his father gave him for his fifteenth birthday with East and Hudson River so they both agree to his request.

  • Hebe
    Hebe (mythology)
    In Greek mythology, Hēbē is the goddess of youth . She is the daughter of Zeus and Hera. Hebe was the cupbearer for the gods and goddesses of Mount Olympus, serving their nectar and ambrosia, until she was married to Heracles ; her successor was the young Trojan prince Ganymede...

    - The Goddess of Youth. She was mentioned in a few of the books in lists of which minor Gods had turned over to the Titans' side.

  • Hecate
    Hecate
    Hecate or Hekate is a chthonic Greco-Roman goddess associated with magic, witchcraft, necromancy, and crossroads.She is attested in poetry as early as Hesiod's Theogony...

    - The minor Goddess of Magic
    Magic (paranormal)
    Magic is the claimed art of manipulating aspects of reality either by supernatural means or through knowledge of occult laws unknown to science. It is in contrast to science, in that science does not accept anything not subject to either direct or indirect observation, and subject to logical...

    . Hecate helps Kronos
    Cronus
    In Greek mythology, Cronus or Kronos was the leader and the youngest of the first generation of Titans, divine descendants of Gaia, the earth, and Uranus, the sky...

     in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    by attacking Olympus
    Mount Olympus
    Mount Olympus is the highest mountain in Greece, located on the border between Thessaly and Macedonia, about 100 kilometres away from Thessaloniki, Greece's second largest city. Mount Olympus has 52 peaks. The highest peak Mytikas, meaning "nose", rises to 2,917 metres...

     and making cars stay away from Manhattan
    Manhattan
    Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

    . She is the mother of C.C. (Circe
    Circe
    In Greek mythology, Circe is a minor goddess of magic , described in Homer's Odyssey as "The loveliest of all immortals", living on the island of Aeaea, famous for her part in the adventures of Odysseus.By most accounts, Circe was the daughter of Helios, the god of the sun, and Perse, an Oceanid...

    ), who turns Percy into a guinea pig in The Sea of Monsters
    The Sea of Monsters
    The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

    . She is the ruler of the empousai
    Empusa
    Empusa is a demigoddess of Greek mythology. In later incarnations she appeared as a species of monsters commanded by Hecate ....

    , two of which attack Percy in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , it is shown that she has a cabin at Camp Half-Blood, led by her daughter Lou Ellen.

  • Hudson River - The River God who is the embodiment of the Hudson River
    Hudson River
    The Hudson is a river that flows from north to south through eastern New York. The highest official source is at Lake Tear of the Clouds, on the slopes of Mount Marcy in the Adirondack Mountains. The river itself officially begins in Henderson Lake in Newcomb, New York...

    . He first appears in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . He dislikes Percy and East River
    East River
    The East River is a tidal strait in New York City. It connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island from the island of Manhattan and the Bronx on the North American mainland...

    . Percy asks him to sink all of the Titan ships that come in his river, and splits the sand dollar
    Sand dollar
    The term Sand dollar refers to species of extremely flattened, burrowing echinoids belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are known as sea biscuits...

     his father gave him for his fifteenth birthday with East River and Hudson so they both agree to his request.

  • Hypnos
    Hypnos
    In Greek mythology, Hypnos was the personification of sleep; the Roman equivalent was known as Somnus. His twin was Thánatos ; their mother was the primordial goddess Nyx . His palace was a dark cave where the sun never shines. At the entrance were a number of poppies and other hypnogogic plants...

    - The God of Sleep and father of Morpheus. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , it shown that Hypnos has his own cabin. Clovis is one of Hypnos' sons.

  • Iris
    Iris (mythology)
    In Greek mythology, Iris is the personification of the rainbow and messenger of the gods. As the sun unites Earth and heaven, Iris links the gods to humanity...

    - The Goddess of Rainbow
    Rainbow
    A rainbow is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines on to droplets of moisture in the Earth's atmosphere. It takes the form of a multicoloured arc...

    s. She helps people deliver messages through Iris messages. Percy uses Iris messages a lot throughout the series by finding a rainbow
    Rainbow
    A rainbow is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines on to droplets of moisture in the Earth's atmosphere. It takes the form of a multicoloured arc...

     and asking Iris to accept his offering. He then throws a golden drachma into the rainbow, says the name of the person he would like to contact and where the person is, and then he can see and talk to the person. Iris specializes in delivering messages through rainbows. She does not appear in the series, but later on gets her own cabin at Camp Half-Blood. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , she is revealed to be the mother of Butch. Iris is said to be on good terms with Chiron and Hermes. In The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    , she is revealed to be running an organic co-op venture, The ROFL co-op. She invites Frank Zhang to stay and become a "ROFLcopter". She send Frank, Percy and Hazel to Phineas the seer to discover where Thanatos is being kept.

  • Janus
    Janus
    -General:*Janus , the two-faced Roman god of gates, doors, doorways, beginnings, and endings*Janus , a moon of Saturn*Janus Patera, a shallow volcanic crater on Io, a moon of Jupiter...

    - The God of Gates, Doorways, Beginnings and Endings. He appears as a minor character in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    where he offers Annabeth a choice between two doors, which represents the situation she was in when she had to make the decision about saving Luke's soul. He has two faces, and each face seems to think the exact opposite of what the other face thinks. He is also mentioned when Percy Jackson has a dream of Deadalus. Janus makes him choose to become a murderer, which he must bear a burden for as long as he lives.

  • Khione
    Chione (daughter of Boreas)
    In Greek mythology Chione, or Khione, , the nymph or minor goddess of snow, was the daughter of Boreas, the North Wind, and Oreithyia, an Athenian princess whom he abducted. Her siblings included Zetes, Calaides and Cleopatra. She was loved by Poseidon and had with him a son Eumolpus...

    - The Goddess of Winter and daughter of Boreas who appears in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . Jason, Piper, and Leo encounter her in Boreas' palace. She ends up betraying them to help Gaia
    Gaia (mythology)
    Gaia was the primordial Earth-goddess in ancient Greek religion. Gaia was the great mother of all: the heavenly gods and Titans were descended from her union with Uranus , the sea-gods from her union with Pontus , the Giants from her mating with Tartarus and mortal creatures were sprung or born...

     in her conquest.

  • Morpheus
    Morpheus (mythology)
    Morpheus in Greek mythology is the god of dreams, leader of the Oneiroi. Morpheus has the ability to take any human form and appear in dreams...

    - The God of Dreams and son of Hypnos. He appears in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , putting all mortals to sleep in Manhattan
    Manhattan
    Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

     before Kronos's army invades Olympus. He also puts Grover to sleep for two months, after he tries to defend the forest of Central Park.

  • Melinoe
    Melinoe
    Melinoe was the ancient Greek goddess of propitiation-offerings made to the deceased. She wandered the earth every night with a train of ghosts, scaring anyone in their path. This was said to be the reason that dogs would bark at seemingly nothing at night...

    - The Goddess of Ghost
    Ghost
    In traditional belief and fiction, a ghost is the soul or spirit of a deceased person or animal that can appear, in visible form or other manifestation, to the living. Descriptions of the apparition of ghosts vary widely from an invisible presence to translucent or barely visible wispy shapes, to...

    s. She lives in the Underworld
    Underworld
    The Underworld is a region which is thought to be under the surface of the earth in some religions and in mythologies. It could be a place where the souls of the recently departed go, and in some traditions it is identified with Hell or the realm of death...

    . Half of her is pale chalky white and the other half is pitch black. She appears in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    in the short story "Percy Jackson and the Sword of Hades". She scares people by showing them the ghosts of deaths they regret. She shows Thalia her mother and Nico his mother. Percy does not have any ghosts because he has made peace with them.

  • Nemesis
    Nemesis (mythology)
    In Greek mythology, Nemesis , also called Rhamnousia/Rhamnusia at her sanctuary at Rhamnous, north of Marathon, was the spirit of divine retribution against those who succumb to hubris . The Greeks personified vengeful fate as a remorseless goddess: the goddess of revenge...

    - The Goddess of Revenge and Balance. She never makes any actual appearances in the books, but she is the mother of Ethan Nakamura who appears in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    and The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    where she is mentioned.

  • Pan - A Satyr who is the God of the Wild. Satyrs have been looking for him for two thousand years. He appears in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . Once Percy and the others find Pan in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    , Pan dies peacefully.

  • Persephone
    Persephone
    In Greek mythology, Persephone , also called Kore , is the daughter of Zeus and the harvest-goddess Demeter, and queen of the underworld; she was abducted by Hades, the god-king of the underworld....

    - The Goddess of Springtime and Queen of the Underworld. She is married to Hades. Her parents are Demeter and Zeus. Hades only allows Persephone to visit her mother in the spring and summer. Unlike most minor gods, Persephone fights with the gods during the battle against the Titans. Persephone appears in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    and The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . She is notably much kinder and more beautiful in the spring and summer.

  • Phobos
    Phobos (mythology)
    Phobos is the personification of horror in Greek mythology. He is the offspring of Ares and Aphrodite. He was known for accompanying Ares into battle along with his brother, Deimos, the goddess Enyo, and his father’s attendants. Timor is his Roman equivalent...

    - The God of Fear and the son of Ares. He appears in the "Percy Jackson and the Stolen Chariot" story in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    . Phobos and his brother Deimos
    Deimos (mythology)
    In Greek mythology, Deimos was the personification of terror.He was the son of Ares and Aphrodite. He is the twin brother of Phobos and the goddess Enyo who accompanied Ares into battle, as well as his father's attendants, Trembling, Fear, Dread, and Panic...

     steal Ares' war chariot from Clarisse. Then Clarisse and Percy have to find it. Phobos has the power of showing people their greatest fears. He shows Percy his greatest fear, which is Camp Half-Blood catching on fire and burning, when they are fighting in an aquarium in a zoo. The word "Phobia
    Phobia
    A phobia is a type of anxiety disorder, usually defined as a persistent fear of an object or situation in which the sufferer commits to great lengths in avoiding, typically disproportional to the actual danger posed, often being recognized as irrational...

    " was named after him.

  • Pompona
    Pomona
    Pomona was a goddess of fruitful abundance in ancient Roman religion and myth. Her name comes from the Latin word pomum, "fruit," specifically orchard fruit. She was said to be a wood nymph and a part of the Numia, guardian spirits who watch over people, places, or homes...

    - The Roman Goddess of Plenty. A statue of her on top of a hotel comes to life in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . She becomes upset with Percy when he thinks she is Demeter. She is also cranky because all of the demigods who walk into the hotel ask her to watch their possessions. She is on the side of the Titans.

  • Terminus - The Roman God of Boundaries. In The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    , he helped Percy defeat Polybotes.

  • Thanatos
    Thanatos
    In Greek mythology, Thanatos was the daemon personification of death. He was a minor figure in Greek mythology, often referred to but rarely appearing in person...

    - The God of Death and a lieutenant of Hades who serves as a patrol guard to stop souls or ghost from escaping. In The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    , Thanatos was referenced when Percy, Nico, and Thalia visit King Sisyphus. He appears in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    having been trapped in chains which caused some Greek Mythology characters to return through the Doors of Death. After he is freed by Percy, Hazel, and Frank, he leaves to make sure that no one else would make their way through the Doors of Death. It is said he is often confused with Cupid.

  • Triton
    Triton (mythology)
    Triton is a mythological Greek god, the messenger of the big sea. He is the son of Poseidon, god of the sea, and Amphitrite, goddess of the sea, whose herald he is...

    - The Sea Messenger God and the son of Poseidon and Amphitrite. He is depicted as a merman with two fish tails. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , Triton was with his parents talking strategy revolving on Oceanus' war on Poseidon. He is shown to be cold and arrogant to Percy, but respects Tyson.

  • Tyche
    Tyche
    In ancient Greek city cults, Tyche was the presiding tutelary deity that governed the fortune and prosperity of a city, its destiny....

    - The Goddess of Fortune. At Camp Half-Blood, her children reside in Cabin 19. According to Rick Riordan's website, Tyche is the most difficult goddess to find.

Titans
Titan (mythology)
In Greek mythology, the Titans were a race of powerful deities, descendants of Gaia and Uranus, that ruled during the legendary Golden Age....

  • Aigaios - The Titan of Sea Storms. Like Oceanus, he did not fight in the first war. In The Titan's Curse, Aigaios was mentioned by Tyson to be assisting Oceanus in protecting the Princess Andromeda from Poseidon.

  • Atlas
    Atlas (mythology)
    In Greek mythology, Atlas was the primordial Titan who supported the heavens. Although associated with various places, he became commonly identified with the Atlas Mountains in north-west Africa...

    - The Titan General. He is the father of Zoë Nightshade and her sisters, the Hesperides
    Hesperides
    In Greek mythology, the Hesperides are nymphs who tend a blissful garden in a far western corner of the world, located near the Atlas mountains in North Africa at the edge of the encircling Oceanus, the world-ocean....

    . He was imprisoned in San Francisco upon a mountaintop, forever cursed to uphold the sky. He escaped briefly during The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    but was cleverly subdued by Artemis and Percy. He is the father of Calypso and Zoë Nightshade. He is the main antagonist of The Titan's Curse.

  • Helios
    Helios
    Helios was the personification of the Sun in Greek mythology. Homer often calls him simply Titan or Hyperion, while Hesiod and the Homeric Hymn separate him as a son of the Titans Hyperion and Theia or Euryphaessa and brother of the goddesses Selene, the moon, and Eos, the dawn...

    - The Titan of the Sun and son of Hyperion. In The Titan's Curse, Apollo mentioned that he and Selene faded due to the Romans being too lazy to build their temples and make sacrifices to them.

  • Hyperion
    Hyperion (mythology)
    Hyperion was one of the twelve Titans of Ancient Greece, the sons and daughters of Gaia and Ouranos , which were later supplanted by the Olympians. He was the brother of Cronus. He was also the lord of light, and the Titan of the east...

    - The Titan of Burning Light and father of Helios and Selene. He appears only in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    in a battle against Percy. Hyperion has a very fiery temper and dresses in full golden armor. He was defeated by Percy Jackson and the other satyrs by being thrown in the water.

  • Iapetus
    Iapetus (mythology)
    In Greek mythology, Iapetus , also Iapetos or Japetus , was a Titan, the son of Uranus and Gaia, and father of Atlas, Prometheus, Epimetheus, and Menoetius and through Prometheus, Epimetheus and Atlas an ancestor of the human race...

    - The Titan of Mortalilty, Pain and Death. He accompanies Ethan Nakamura in the Underworld in an attempt to steal the Sword of Hades in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    . Percy drags him into the River Lethe and brainwashes him. Percy then tells him he is Bob the Titan.

  • Krios
    Crius
    In Greek mythology, Crius, Kreios or Krios was one of the Titans in the list given in Hesiod's Theogony, a son of Uranus and Gaia. The least individualized among them, he was overthrown in the Titanomachy. M.L...

    - Krios is the Lord of the South and the Titan of Stars and the Constellations. He is only mentioned in one of Percy's dreams, where he is forced to babysit Atlas. He is dissatisfied with his condition because he only wears ram horns, but Hyperion can blow up into flame. He is also mentioned fleeing when Kronos was defeated. He wears armor that has glowing stars on it. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , Jason mentions that he defeated Krios with his bare hands.

  • Kronos
    Cronus
    In Greek mythology, Cronus or Kronos was the leader and the youngest of the first generation of Titans, divine descendants of Gaia, the earth, and Uranus, the sky...

    - The Lord of the Titans and the main antagonist of the first series. He is the father of Zeus, Poseidon, and Hades, Chiron, and grandfather of Percy. He tries to get Percy to join him and fight against the Olympians. His weapon is a scythe
    Scythe
    A scythe is an agricultural hand tool for mowing grass, or reaping crops. It was largely replaced by horse-drawn and then tractor machinery, but is still used in some areas of Europe and Asia. The Grim Reaper is often depicted carrying or wielding a scythe...

    , a "six-foot-long blade curved like a crescent moon" as said in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . It is hinted in the book that it is Luke's old sword, Backbiter, was remade into the scythe. He is the father of the "Big Three," which are Zeus
    Zeus
    In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

    , Poseidon
    Poseidon
    Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

    , and Hades
    Hades
    Hades , Hadēs, originally , Haidēs or , Aidēs , meaning "the unseen") was the ancient Greek god of the underworld. The genitive , Haidou, was an elision to denote locality: "[the house/dominion] of Hades". Eventually, the nominative came to designate the abode of the dead.In Greek mythology, Hades...

    . He is also the father of Demeter
    Demeter
    In Greek mythology, Demeter is the goddess of the harvest, who presided over grains, the fertility of the earth, and the seasons . Her common surnames are Sito as the giver of food or corn/grain and Thesmophoros as a mark of the civilized existence of agricultural society...

    , Hera
    Hera
    Hera was the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno. The cow and the peacock were sacred to her...

    , and Hestia
    Hestia
    In Greek mythology Hestia , first daughter of Cronus and Rhea , is the virgin goddess of the hearth, architecture, and of the right ordering of domesticity and the family. She received the first offering at every sacrifice in the household. In the public domain, the hearth of the prytaneum...

    . He was sent to Tartarus
    Tartarus
    In classic mythology, below Uranus , Gaia , and Pontus is Tartarus, or Tartaros . It is a deep, gloomy place, a pit, or an abyss used as a dungeon of torment and suffering that resides beneath the underworld. In the Gorgias, Plato In classic mythology, below Uranus (sky), Gaia (earth), and Pontus...

     by his sons and is reforming in The Sea of Monsters
    The Sea of Monsters
    The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

    , The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    , and The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . When he eventually reforms himself, he takes matters in his own hands. The only reason Luke was not killed was because of his loyalty to Kronos. In The Battle of the Labyrinth, Kronos is delayed to attack Camp Half-Blood. In the The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , Kronos leads the Titans to Olympus while the gods were fighting with Typhon
    Typhon
    Typhon , also Typhoeus , Typhaon or Typhos was the last son of Gaia, fathered by Tartarus, and the most deadly monster of Greek mythology. He was known as the "Father of all monsters"; his wife Echidna was likewise the "Mother of All Monsters."Typhon was described in pseudo-Apollodorus,...

    . Later, Annabeth and Percy save Luke, and Luke sacrificies himself for Kronos to die.

  • Oceanus
    Oceanus
    Oceanus ; , Ōkeanós) was a pseudo-geographical feature in classical antiquity, believed by the ancient Greeks and Romans to be the world-ocean, an enormous river encircling the world....

    - The Titan of the Ocean. In this series, Oceanus is often depicted as having the upper body of a muscular man with a long beard and horns (often represented as the claws of a crab), and the lower torso of a serpent. He did not fight the Olympians in the first war, but in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , he joins Kronos and is at war with Poseidon. Oceanus joins the side that he thinks will win. After it becomes clear that Kronos had lost the battle, he stops fighting Poseidon and escapes back to the depths of the ocean.

  • Prometheus
    Prometheus
    In Greek mythology, Prometheus is a Titan, the son of Iapetus and Themis, and brother to Atlas, Epimetheus and Menoetius. He was a champion of mankind, known for his wily intelligence, who stole fire from Zeus and gave it to mortals...

    - The Titan of Forethought (and as Grover says, "Crafty Counsel", with emphasis on "Crafty"). He appeared in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , where he gives Percy Pandora's Box
    Pandora's box
    Pandora's box is an artifact in Greek mythology, taken from the myth of Pandora's creation around line 60 of Hesiod's Works and Days. The "box" was actually a large jar given to Pandora , which contained all the evils of the world. When Pandora opened the jar, all its contents except for one item...

     (or Pandora's pithos
    Pithos
    Pithos originally referred in ancient Greek to a large storage jar of a characteristic shape. The word was at one point used by western classical archaeologists to mean the jars uncovered by excavation in Crete and Greece, it has now been taken into the American English language as a general word...

    ) which contains the spirit Hope. He fought with Olympians in the first war, then switched sides in the second war because he was sure the Titans would win. He is otherwise neutral, as he always tries to pick the winning side. After Kronos was defeated, he is mentioned to have run away and has sent a list of excuses to the Big Three.

  • Selene
    Selene
    In Greek mythology, Selene was an archaic lunar deity and the daughter of the Titans Hyperion and Theia. In Roman mythology, the moon goddess is called Luna, Latin for "moon"....

    - The Titan of the Moon and daughter of Hyperion. In The Titan's Curse, Apollo mentioned that she and Helios faded due to the Romans being too lazy to build their temples and make sacrifices to them.

Giants

  • Alcyoneus
    Alcyoneus
    Alcyoneus or Alkyoneus is a name that refers to several distinct figures in Greek mythology.-The Giant:Alcyoneus was the eldest of the Thracian Gigantes of Greek mythology. He was born in full armor with a spear in his hand...

    - A Giant who was attempted to be risen in WW2 era by Gaea but was stopped by Hazel. Alycyoneus defeated the Fifth cohort team in his new homeland Alaska, and captured Thanatos to stop death. He was defeated by Frank and Arion after being taken out of Alaska (since he can't be killed in his homeland). He is the bane of Hades.

  • Enceladus
    Enceladus (mythology)
    In Greek mythology, Enceladus was one of the Gigantes, the enormous children of Gaia fertilized by the blood of castrated Uranus...

    - A Giant who was the first to be awakened in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . He was killed when Jason and Jupiter threw lightning at him. He is the bane of Athena.

  • Polybotes
    Polybotes
    In Greek mythology, Polybotes was a Gigante , therefore son of Gaea , who fought Poseidon during the battle between the Giants and the Gods.-Etymology:...

    - A Giant who attempted to destroy Camp Jupiter with an army of monsters, and would have if the camp wasn't helped by Percy, Hazel, Frank, and Tyson. He was destroyed by Percy and Terminus. He is the bane of Poseidon.

  • Porphyrion
    Porphyrion
    In Greek mythology, Porphyrion was a giant, one of the sons of Uranus and Gaia. After the Olympian gods imprisoned the Titans in Tartarus, Porphyrion was one of twenty-four anguipede giants who made war on Olympus....

    - A Giant who was the second to be awakened in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . He fought Jason and his friends and was teleported away before Hera could finish him off. He is the bane of Zeus.

Immortals

  • Calypso
    Calypso (mythology)
    Calypso was a nymph in Greek mythology, who lived on the island of Ogygia, where she detained Odysseus for a number of years. She is generally said to be the daughter of the Titan Atlas....

    - Calypso first appears in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . She nurses Percy back to health on her island. She is shown to be in love with Percy, and is heartbroken when he leaves. She is cursed with this as punishment because she supported her father, Atlas, the Titans in the first war. Near the end of The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , she is freed from her punishment as part of Percy's wish. She is immortal and lived on an island that makes anyone who lives there immortal for the time of their stay, though once they leave they can never come back.

  • Charon
    Charon (mythology)
    In Greek mythology, Charon or Kharon is the ferryman of Hades who carries souls of the newly deceased across the rivers Styx and Acheron that divided the world of the living from the world of the dead. A coin to pay Charon for passage, usually an obolus or danake, was sometimes placed in or on...

    - Charon is the ferryman who carries people on his boat through the River Styx. Percy and his friends meet him in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    .

  • Chiron Kentavros
    Chiron
    In Greek mythology, Chiron was held to be the superlative centaur among his brethren.-History:Like the satyrs, centaurs were notorious for being wild and lusty, overly indulgent drinkers and carousers, given to violence when intoxicated, and generally uncultured delinquents...

    - In the series, he plays the part of the mentor and activities director to the main protagonist Percy Jackson and the other demigods residing at Camp Half-Blood. In The Lightning Thief, he appears under the pseudonym of Mr. Brunner. Later, it is revealed that he is the son of Kronos. Chiron is a centaur
    Centaur
    In Greek mythology, a centaur or hippocentaur is a member of a composite race of creatures, part human and part horse...

    ; his horse half is a white stallion.

  • Eurytion
    Eurytion
    In Greek mythology Eurytion , "widely-honoured", was a name attributed to six individuals....

    - A worker of Geryon
    Geryon
    In Greek mythology, Geryon , son of Chrysaor and Callirrhoe and grandson of Medusa, was a fearsome giant who dwelt on the island Erytheia of the mythic Hesperides in the far west of the Mediterranean. A more literal-minded later generation of Greeks associated the region with Tartessos in southern...

     and the owner of Orthrus
    Orthrus
    In Greek mythology, Orthrus or Orthus was a two-headed dog and a doublet of Cerberus, both whelped by the chthonic monsters Echidna and Typhon.He was owned by the three-bodied giant, Geryon...

    . He is usually seen with a huge club. He is a son of Ares. He is unenthusiastic about and later rebellious against working for Geryon. When Geryon is defeated, he starts planning to take over the Triple G Ranch. He gives Annabeth a mechanical spider to find Hephaestus.

  • Fleecy - Fleecy is a 'ROFL-copter' at the R.O.F.L. co-op owned by Iris. She is a Nebulae (a cloud nymph), who is described as being young, but having frizzy white hair that sticks out on either side of her head, strange eyes in which the iris switches between gray, white and black. She is also said to be short and muscular, wearing combat boots, cargo shorts and a yellow t-shirt with the R.O.F.L. logo on it. She manages Iris-messaging, and has her own direct line, in which you have to say 'O Fleecy, do me a solid, show me_____'

  • Lupa
    Capitoline Wolf
    The Capitoline Wolf is a bronze sculpture of a she-wolf suckling twin infants, inspired by the legend of the founding of Rome. According to the legend, when Numitor, grandfather of the twins Romulus and Remus, was overthrown by his brother Amulius, the usurper ordered the twins to be cast into...

    - Lupa is the wolf
    Gray Wolf
    The gray wolf , also known as the wolf, is the largest extant wild member of the Canidae family...

     that raised Romulus and Remus
    Romulus and Remus
    Romulus and Remus are Rome's twin founders in its traditional foundation myth, although the former is sometimes said to be the sole founder...

    . She first appeared in "The Lost Hero" where she is the Activities Director at Camp Jupiter.

  • Phoebe - The best tracker of Artemis' hunters. She hit the Stoll brothers with arrows in a game of Capture the Flag
    Capture the flag
    Capture the Flag is a traditional outdoor sport generally played by children, where two teams each have a flag and the objective is to capture the other team's flag, located at the team's "base," and bring it safely back to their own base...

    . She was supposed to go on the quest in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    , but the Stoll brothers (at the request of Aphrodite) gave her a poisoned (but non-lethal) shirt that prevented her from going. Percy ended up replacing her. She appears in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . The incident with the Stolls appears to have had a lasting effect on her; she appears to think that every boy wants to play a prank on her.

  • Zoë Nightshade - The lead Huntress of Artemis. She is a daughter of the Titan General Atlas and the sea goddess Pleione. Percy later discovers she made his magic blade, Riptide. She uses a hunting knife and a bow as her weapons. She is a former Hesperide, but was blotted from history for aiding the half-blood Hercules in slipping past the dragon Ladon and obtaining a golden apple. Ultimately, a combination of Ladon's poison and her father's attacks kill her. In remembrance of her sacrifice, Artemis turns her into a constellation, "The Huntress."

Demigods

Bianca di Angelo - A daughter of Hades
Hades
Hades , Hadēs, originally , Haidēs or , Aidēs , meaning "the unseen") was the ancient Greek god of the underworld. The genitive , Haidou, was an elision to denote locality: "[the house/dominion] of Hades". Eventually, the nominative came to designate the abode of the dead.In Greek mythology, Hades...

, Nico's older sister, Percy and the Grace siblings' cousin and later, a Huntress of Artemis
Artemis
Artemis was one of the most widely venerated of the Ancient Greek deities. Her Roman equivalent is Diana. Some scholars believe that the name and indeed the goddess herself was originally pre-Greek. Homer refers to her as Artemis Agrotera, Potnia Theron: "Artemis of the wildland, Mistress of Animals"...

. After Artemis is kidnapped in The Titan's Curse, she undertakes the quest to rescue Artemis alongside Percy Jackson, Grover, Thalia Grace, and Zoë Nightshade. She sacrifices herself to destroy a defunct prototype of Talos because she stole an item from the Junkyard of the Gods. Nico di Angelo blames Percy for her death and harbors hard feelings for him for a while afterward.
  • Butch - The demigod son of Iris
    Iris (mythology)
    In Greek mythology, Iris is the personification of the rainbow and messenger of the gods. As the sun unites Earth and heaven, Iris links the gods to humanity...

     who first appears in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . He is the counselor of the Iris Cabin. It is said he is the best equestrian
    Equestrianism
    Equestrianism more often known as riding, horseback riding or horse riding refers to the skill of riding, driving, or vaulting with horses...

     at camp.

  • Castor
    Castor and Pollux
    In Greek and Roman mythology, Castor and Pollux or Polydeuces were twin brothers, together known as the Dioscuri . Their mother was Leda, but Castor was the mortal son of Tyndareus, king of Sparta, and Pollux the divine son of Zeus, who visited Leda in the guise of a swan...

    - The son of Dionysus
    Dionysus
    Dionysus was the god of the grape harvest, winemaking and wine, of ritual madness and ecstasy in Greek mythology. His name in Linear B tablets shows he was worshipped from c. 1500—1100 BC by Mycenean Greeks: other traces of Dionysian-type cult have been found in ancient Minoan Crete...

     and the twin brother of Pollux. Castor died at age 17 during the Battle of the Labyrinth when he was stabbed in the arm and hit on the head by an enemy demigod.

  • Charles Beckendorf - A son of Hephaestus
    Hephaestus
    Hephaestus was a Greek god whose Roman equivalent was Vulcan. He is the son of Zeus and Hera, the King and Queen of the Gods - or else, according to some accounts, of Hera alone. He was the god of technology, blacksmiths, craftsmen, artisans, sculptors, metals, metallurgy, fire and volcanoes...

    , known to be able to build almost anything. He is lead counselor for Cabin 9. He had a minor role in the first four books in the series, but has a larger role in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . He has a crush on Silena Beauregard, whom he starts dating from the short story The Bronze Dragon contained in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    . Most members of Camp Half-Blood call him by his surname, Beckendorf. He sacrifices himself at the beginning of The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    to destroy the Princess Andromeda, a ship that was Kronos' headquarters, unaware that it was actually because of Silena (a spy on the camp) that he lost his life.

  • Chris Rodriguez - A half-blood son of Hermes who had gone to Kronos' side until having gone completely insane in the Labyrinth. Clarisse finds him and brings him to camp where Dionysus makes him sane again. He later has a relationship with Clarisse.

  • Clarisse la Rue - One of the children of Ares and the head of Cabin 5. She is hot-tempered, arrogant, big, tall, strong, and is known to dislike Percy. Despite her brash nature, she is capable of compassion, shown when she cares for Chris Rodriguez, a half-blood who became a traitor and was later found crazed and stumbling within the Labyrinth in a bout of madness. She is later seen holding Chris's hand at a campfire after Dionysus cures him of his madness. She later befriends Silena Beauregard, apparently after Silena gives her advice on her first boyfriend. She and her cabin later fight with the Apollo cabin over a flying chariot. Later, she prevents Cabin 5 from joining in the battle of Manhattan because of the chariot fight, though Michael Yew gives it to them. Silena later impersonates her to bring the Ares cabin into the battle by taking her armor and spear. Silena is killed by a drakon during this charade. To avenge her friend, Clarisse stabs the drakon in the eye, breaking her spear and electrocuting the drakon. She then runs at Kronos's armies, appearing to be as invulnerable as Percy, even though she does not have the Curse of Achilles. Percy recognizes that an aura around her highly resembles that of Ares when Percy fought him. Thalia remarks that it is a blessing of Ares and that she has never seen it before in person.

  • Clovis - The demigod son of Hypnos
    Hypnos
    In Greek mythology, Hypnos was the personification of sleep; the Roman equivalent was known as Somnus. His twin was Thánatos ; their mother was the primordial goddess Nyx . His palace was a dark cave where the sun never shines. At the entrance were a number of poppies and other hypnogogic plants...

     who first appears in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , where he tries to help Annabeth on how Jason Grace's memory was lost. He is the counselor of the Hypnos Cabin.

  • Connor Stoll - One of the children of Hermes
    Hermes
    Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

    . He is brothers to Travis Stoll. Both are known to be crafty and mischievous. He and his brother's shenanigans incapacitated a member of Artemis's Huntresses, which enabled Percy to join the quest of The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . He and his brother have a larger role in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    and both survive. He and his brother head Cabin 11 after Luke goes over to Kronos.

  • Drew - A demigod daughter of Aphrodite who first appeared in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . She was the Cabin counselor after Silena, but was forced down by Piper McLean
    Piper McLean
    Piper McLean is a fictional character and the deuteragonist in Rick Riordan's The Heroes of Olympus book series, the sequel to the Percy Jackson & the Olympians series. She first appears in The Lost Hero, the first novel of the series, as a fifteen year-old undetermined demigod who attends the...

    . She is vain and sarcastic, and can also charmspeak.

  • Ethan Nakamura - A son of Nemesis
    Nemesis (mythology)
    In Greek mythology, Nemesis , also called Rhamnousia/Rhamnusia at her sanctuary at Rhamnous, north of Marathon, was the spirit of divine retribution against those who succumb to hubris . The Greeks personified vengeful fate as a remorseless goddess: the goddess of revenge...

     who feels that his mother is unappreciated and fights for her. She took his eye in return for the promise that Ethan would change the world. He turned to Kronos' side after Percy saved his life by letting him live after a duel. After the duel, he pledges himself to Kronos, the last half blood needed for his resurrection. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , he tries to stab Percy in the small of his back (his Achilles spot), but Annabeth leaps in front of the dagger, and Kronos believes that he tried to stab Percy's Achilles spot. He is in the truce party along with the Empousa queen and Prometheus. Ethan later figures out that the small of Percy's back was his Achilles spot, but instead of killing him, he tries to kill Kronos. His blade breaks, and one piece ricochets and hits him in his stomach. Kronos laughs, and opens a fissure, making him fall easily. Ethan's last words were "Deserve better...if only the minor gods just...had thrones..."

  • Harley - A demigod son of Hephaestus who first appeared in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    .

  • Jake Mason - A son of Hephaestus. He becomes the head of Hephaestus' cabin after the death of Charles Beckendorf in The Last Olympian. He fights in the war between the gods and Titans. He later steps down and gives the role to Leo. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , he was seen in a body cast after trying to catch Festus. He resigned after Festus led Leo to Bunker 9.

  • Katie Gardner - A daughter of Demeter that is the head counselor for cabin four at Camp Half-Blood, as seen in The Last Olympian. Miranda Gardiner is her deputy taking over in winter because Katie is not a year-rounder. She fights in and survives the war between gods and the Titans. Katie strongly dislikes the Stoll twins, because they once put chocolate Easter bunnies on the Demeter cabin's grass roof. She is the cousin of Percy Jackson, Thalia Grace, Nico di Angelo and Bianca di Angelo.

  • Lacy - Lacy is a daughter of Aphrodite
    Aphrodite
    Aphrodite is the Greek goddess of love, beauty, pleasure, and procreation.Her Roman equivalent is the goddess .Historically, her cult in Greece was imported from, or influenced by, the cult of Astarte in Phoenicia....

     who befriends Piper McLean
    Piper McLean
    Piper McLean is a fictional character and the deuteragonist in Rick Riordan's The Heroes of Olympus book series, the sequel to the Percy Jackson & the Olympians series. She first appears in The Lost Hero, the first novel of the series, as a fifteen year-old undetermined demigod who attends the...

     in "The Lost Hero".

  • Lee Fletcher - A son of Apollo. He was the original head of Cabin 7 before he was killed by a giant in The Battle of the Labyrinth.

  • Lou Ellen - Daughter of Hecate
    Hecate
    Hecate or Hekate is a chthonic Greco-Roman goddess associated with magic, witchcraft, necromancy, and crossroads.She is attested in poetry as early as Hesiod's Theogony...

    , who was first mentioned in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . She is known for playing magical tricks on fellow campers.

  • Malcolm - A son of Athena
    Athena
    In Greek mythology, Athena, Athenê, or Athene , also referred to as Pallas Athena/Athene , is the goddess of wisdom, courage, inspiration, civilization, warfare, strength, strategy, the arts, crafts, justice, and skill. Minerva, Athena's Roman incarnation, embodies similar attributes. Athena is...

    . He is the assistant counselor of the Athena cabin. He leads Athena's cabin to a bridge or tunnel in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . His last name is never revealed. He walks in on Percy and Annabeth hugging in The Battle of The Labyrinth.

  • Mark - A son of Ares
    Ares
    Ares is the Greek god of war. He is one of the Twelve Olympians, and the son of Zeus and Hera. In Greek literature, he often represents the physical or violent aspect of war, in contrast to the armored Athena, whose functions as a goddess of intelligence include military strategy and...

    . He is mentioned by Percy once in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    in the short story Percy Jackson and the Stolen Chariot when Percy asks Clarisse which of her brothers played a prank on her. He may have been the one that Percy awoke from a midday nap in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    .

  • Michael Yew - A son of Apollo
    Apollo
    Apollo is one of the most important and complex of the Olympian deities in Greek and Roman mythology...

    . He is the leader of the Apollo Cabin after Lee Fletcher died in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . He is described as very short, four foot six, with personality that makes up for his height, and a face that reminds Percy of a ferret. In The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    , in an interview with Clarisse, she mentions that she would want to pulverize Michael, thus stating that they are enemies. Percy finds it very interesting that he's the counselor. He is supposedly killed leading a group of demigods in the fight against Kronos' army. Percy looked everywhere for him, but only found his bow. He is presumed deceased, although this was never confirmed.

  • Miranda Gardiner - Miranda is a daughter of Demeter who first appears in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    and is the counselor of her cabin. Miranda had her nose (temporarily) removed by Lou Ellen, a daughter of Hecate.

  • Mitchell - Mitchell is a son of Aphrodite
    Aphrodite
    Aphrodite is the Greek goddess of love, beauty, pleasure, and procreation.Her Roman equivalent is the goddess .Historically, her cult in Greece was imported from, or influenced by, the cult of Astarte in Phoenicia....

     who befriends Piper McLean
    Piper McLean
    Piper McLean is a fictional character and the deuteragonist in Rick Riordan's The Heroes of Olympus book series, the sequel to the Percy Jackson & the Olympians series. She first appears in The Lost Hero, the first novel of the series, as a fifteen year-old undetermined demigod who attends the...

     in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    .

  • Nyssa - Demigod daughter of Hephaestus
    Hephaestus
    Hephaestus was a Greek god whose Roman equivalent was Vulcan. He is the son of Zeus and Hera, the King and Queen of the Gods - or else, according to some accounts, of Hera alone. He was the god of technology, blacksmiths, craftsmen, artisans, sculptors, metals, metallurgy, fire and volcanoes...

    .

  • Pollux
    Castor and Pollux
    In Greek and Roman mythology, Castor and Pollux or Polydeuces were twin brothers, together known as the Dioscuri . Their mother was Leda, but Castor was the mortal son of Tyndareus, king of Sparta, and Pollux the divine son of Zeus, who visited Leda in the guise of a swan...

    - The son of Dionysus
    Dionysus
    Dionysus was the god of the grape harvest, winemaking and wine, of ritual madness and ecstasy in Greek mythology. His name in Linear B tablets shows he was worshipped from c. 1500—1100 BC by Mycenean Greeks: other traces of Dionysian-type cult have been found in ancient Minoan Crete...

     and the twin brother of Castor. He and his brother are described as blond, athletic, plump faced and good looking. He fights and survives the war between the Titans and the Gods, making his father secretly happy.

  • Reyna - A Roman demigod who is the daughter of Bellona and the sister of Hylla. She is mentioned by Jason in The Lost Hero who might be his girlfriend at the Roman camp. She appeared in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    where it was revealed that she has issues with Percy Jackson after what happened at Circe's boutique where she and Hylla once worked at.

  • Silena Beauregard - A daughter of Aphrodite
    Aphrodite
    Aphrodite is the Greek goddess of love, beauty, pleasure, and procreation.Her Roman equivalent is the goddess .Historically, her cult in Greece was imported from, or influenced by, the cult of Astarte in Phoenicia....

     and the head of Cabin 10. Percy regards her as one of the nicer girls of the cabin and acknowledges that she is pretty, but still finds her to be a "neat freak". She participates in the Battle of the Labyrinth. She does not think that she is a good fighter and feels that she does not do anyone any good at camp. She unveils her hatred towards the Hunters of Artemis, who say that love is worthless, to which she responds by stating that she is going to "pulverize" them. Silena is killed by a drakon when she fights it while pretending to be Clarisse in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . It is also revealed in The Last Olympian that she was the spy giving Kronos
    Cronus
    In Greek mythology, Cronus or Kronos was the leader and the youngest of the first generation of Titans, divine descendants of Gaia, the earth, and Uranus, the sky...

     information about what was going on at Camp Half-Blood. When the Stoll brothers ask Percy about it, he will not let Silena be remembered as a spy. She did, however, want to stop being the spy when her boyfriend Charles Beckendorf died (charming her with his looks, Luke had promised that fewer lives would be lost and that Charles would be safe), but was blackmailed by Luke when he threatened to reveal her betrayal. This causes Silena to become even weaker or as Percy described, "She looked like glass. Like she was going to break at any time." Percy also notes that no one says the word "spy" during the burning of her shroud (which was hot pink with an electric spear embroidered on it).

  • Sherman - A son of Ares
    Ares
    Ares is the Greek god of war. He is one of the Twelve Olympians, and the son of Zeus and Hera. In Greek literature, he often represents the physical or violent aspect of war, in contrast to the armored Athena, whose functions as a goddess of intelligence include military strategy and...

    . He, like Mark (another son of Ares), is mentioned by Percy in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    in the short story Percy Jackson and the Stolen Chariot, when Percy asks Clarisse which of her brothers played a prank on her. He also may have been the one that Percy awoke from a midday nap in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    .

  • Travis Stoll - One of the children of Hermes
    Hermes
    Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

    . He and his brother become the new counselors of cabin 11 after Luke went to Kronos. Travis is the older brother of Connor Stoll. Both are known to be crafty and mischievous. Percy finds it ironic that their last name is Stoll, like the word 'stole'. His and his brother's shenanigans incapacitated a member of Artemis's Huntresses, which enabled Percy to join the quest of The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . He and his brother have a larger role in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    and both survive.

  • Will Solace - He is a son of Apollo whom Percy took to heal Annabeth in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    and become the leader of the Apollo Cabin as seen in The Lost Hero.

Mythological characters

Some of the known characters of Greek Mythology have made an appearance in this series:
  • Achilles
    Achilles
    In Greek mythology, Achilles was a Greek hero of the Trojan War, the central character and the greatest warrior of Homer's Iliad.Plato named Achilles the handsomest of the heroes assembled against Troy....

    - The image of Achilles appears briefly in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , warning Percy about The Curse of Achilles.

  • Amazons
    Amazons
    The Amazons are a nation of all-female warriors in Greek mythology and Classical antiquity. Herodotus placed them in a region bordering Scythia in Sarmatia...

    - The Amazons are a tribe of female warriors that usually worshiped the Gods like Ares and Artemis. A bunch of Amazons appear in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    where they are sent to their compound at Reyna's request. They use Amazon.com as their business front.
    • Doris - An Amazon guard who is loyal to Otrera. In The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      , Doris guarded Percy Jackson and Frank Zhang.
    • Hylla - Reyna's sister and the current Queen of the Amazons.
    • Kinzie - An Amazon who is close to Hylla.
    • Lulu - An Amazon guard who is loyal to Otrera. In The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      , Lulu guarded Percy Jackson and Frank Zhang.
    • Otrera
      Otrera
      In Greek mythology, Otrera was a Queen of the Amazons, the consort of Ares, daughter of Eurus, and mother of Hippolyta, Antiope, Melanippe and Penthesilea....

      - The daughter of Ares and the first Queen of the Amazons. In The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      , she is revealed to be among those who emerged from the Doors of Death. She challenged Hylla for the title of Queen of the Amazons. When she planned to defeat Hylla, Otrera plans to have the Amazons help Gaea and the Giants destroy Camp Jupiter. Hylla manages to defeat Otrera twice until Thanatos is freed from the chains he was in.

  • Ariadne
    Ariadne
    Ariadne , in Greek mythology, was the daughter of King Minos of Crete, and his queen Pasiphaë, daughter of Helios, the Sun-titan. She aided Theseus in overcoming the Minotaur and was the bride of the god Dionysus.-Minos and Theseus:...

    - Ariadne once helped Theseus when it came to him slaying the Minotaur. When Theseus unknowingly left Ariadne on an island, she was found by Dionysus who took her on as his wife. Theseus "abandoning" Ariadne was one of the reasons why Dionysus dislikes heroes. Ariadne made an appearance at the end of "The Titan's Curse" where she was walking arm to arm with Dionysus.

  • Circe
    Circe
    In Greek mythology, Circe is a minor goddess of magic , described in Homer's Odyssey as "The loveliest of all immortals", living on the island of Aeaea, famous for her part in the adventures of Odysseus.By most accounts, Circe was the daughter of Helios, the god of the sun, and Perse, an Oceanid...

    - Circe ran a magical beauty boutique in the Sea of Monsters. She was glamorous and went by the alias of C.C. While she treated females at her spa, she turned males into guinea pigs. When Percy was turned into a guinea pig, Annabeth managed to use Hermes' multivitamins to become immune to Circe's spells and escaped with the guinea pigs. Not knowing which one is Percy, Annabeth fed them all multivitamins restoring Circe's victims to normal.

  • Daedalus
    Daedalus
    In Greek mythology, Daedalus was a skillful craftsman and artisan.-Family:...

    - Inventor of the Labyrinth
    Labyrinth
    In Greek mythology, the Labyrinth was an elaborate structure designed and built by the legendary artificer Daedalus for King Minos of Crete at Knossos...

    , son of Athena
    Athena
    In Greek mythology, Athena, Athenê, or Athene , also referred to as Pallas Athena/Athene , is the goddess of wisdom, courage, inspiration, civilization, warfare, strength, strategy, the arts, crafts, justice, and skill. Minerva, Athena's Roman incarnation, embodies similar attributes. Athena is...

    , and father of Icarus
    Icarus
    -Space and astronomy:* Icarus , on the Moon* Icarus , a planetary science journal* 1566 Icarus, an asteroid* IKAROS, a interplanetary unmanned spacecraft...

    . Daedalus killed his nephew Perdix
    Perdix (mythology)
    Perdix was a nephew and student of Daedalus as well as the grandson of Athena in Greek mythology....

     and took his notes, which he then used to cast his animus (soul) into automaton
    Automaton
    An automaton is a self-operating machine. The word is sometimes used to describe a robot, more specifically an autonomous robot. An alternative spelling, now obsolete, is automation.-Etymology:...

    s after Athena
    Athena
    In Greek mythology, Athena, Athenê, or Athene , also referred to as Pallas Athena/Athene , is the goddess of wisdom, courage, inspiration, civilization, warfare, strength, strategy, the arts, crafts, justice, and skill. Minerva, Athena's Roman incarnation, embodies similar attributes. Athena is...

     branded him with the murderer's brand. He originally owned a hellhound
    Hellhound
    A hellhound is a supernatural dog, found in folklore. A wide variety of ominous or hellish supernatural dogs occur in mythologies around the world, similar to the ubiquitous dragon...

     named Mrs. O'Leary and fights the Titan army toward the end of the fourth book. He later decides that it is time to go to the Underworld and leaves Annabeth his laptop which is filled with his notes and ideas. Nico unleashes Daedalus' spirit which destroys the labyrinth. When in the Underworld, King Minos tried to convince the other judges to punish him and fails. Daedalus' spirit now works as the Underworld's architect while being able to visit Icarus and Perdix on weekends.

  • The Fates
    Moirae
    The Moirae, Moerae or Moirai , in Greek mythology, were the white-robed incarnations of destiny . Their number became fixed at three...

    - The three women who control the threads of life. In The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    Percy and Grover encounter them at an old-fashioned fruit stand. In "The Last Olympian," the Fates take Luke's dead body away after the Second Olympian War.
    • Clotho
      Clotho
      Clotho is one of the Three Fates or Moirae, in ancient Greek mythology. Her Roman equivalent is Nona. Clotho was responsible for spinning the thread of human life. She also made major decisions, such as when a person was born, thus in effect controlling people's lives...

      - The Fate who spins the Thread of Life.
    • Lachesis
      Lachesis (mythology)
      In Greek mythology, Lachesis was the second of the Three Fates, or Moirae, also known as the Triple Moon Goddesses or the Lunar Dieties. Each phase of the moon representing each of the fates - Clotho, Lachesis and Atropos...

      - The Fate who measures the Thread of Life.
    • Atropos
      Atropos
      Atropos or Aisa , in Greek mythology, was one of the three Moirae, goddesses of fate and destiny. Her Roman equivalent was Morta.Atropos or Aisa was the oldest of the Three Fates, and was known as the "inflexible" or "inevitable." It was Atropos who chose the mechanism of death and ended the life...

      - The Fate who cuts the Thread of Life.

  • Gaea
    Gaia (mythology)
    Gaia was the primordial Earth-goddess in ancient Greek religion. Gaia was the great mother of all: the heavenly gods and Titans were descended from her union with Uranus , the sea-gods from her union with Pontus , the Giants from her mating with Tartarus and mortal creatures were sprung or born...

    - The embodiment of Earth, the mother of the Titans, Giants, and Antaeus, and grandmother of the Olympian Gods. She serves as the primary antagonist of The Heroes of Olympus
    The Heroes of Olympus
    The Heroes of Olympus is a fantasy book series written by Rick Riordan and based on Greek and Roman mythology. It is the sequel series to the Percy Jackson & the Olympians pentalogy....

    series.

  • King Lycaon - King Lycaon was a king who was turned into a wolf after doing deadly tests on Zeus. In "The Lost Hero," King Lycaon appears where he meets Jason, Leo, and Piper in their search for Aeolus. He and his werewolves were instructed to kidnap Jason and kill Leo and Piper. King Lycaon escaped when the Hunters of Artemis stopped him.

  • King Midas
    Midas
    For the legend of Gordias, a person who was taken by the people and made King, in obedience to the command of the oracle, see Gordias.Midas or King Midas is popularly remembered in Greek mythology for his ability to turn everything he touched into gold. This was called the Golden touch, or the...

    - King Midas was a king who had the Golden Touch. He was referenced in "The Battle of the Labyrinth" where he states that Rachel's gold appearance made her look like she was touched by King Midas. In "The Lost Hero" King Midas was among the dead people brought back to life when the Doors of Death opened in Omaha, Nebraska
    Omaha, Nebraska
    Omaha is the largest city in the state of Nebraska, United States, and is the county seat of Douglas County. It is located in the Midwestern United States on the Missouri River, about 20 miles north of the mouth of the Platte River...

    . When Jason, Piper, and Leo arrived at Midas' mansion, he was polite. Midas told them that it was a silly story that he learned his lesson when he touched his daughter, turning her into solid gold. Midas touched Piper's backpack, turning it into flexible gold and making it magic, proving he still had the magic touch. Midas admitted that he had sometimes pat his son Lityerses on the back accidentally, but he always had the river to rinse it off. Midas finally revealed he was working for the Giants and turned Leo and Piper into gold. He gave Jason a choice: turn into a nice gold statue for his collection or fight Lityerses and die. Jason fought Lityerses and Midas. Midas and his son fought off the Hunters of Artemis before Jason managed to defeat Lityerses and unfreeze Piper and Leo.

  • King Minos
    Minos
    In Greek mythology, Minos was a king of Crete, son of Zeus and Europa. Every year he made King Aegeus pick seven men and seven women to go to Daedalus' creation, the labyrinth, to be eaten by The Minotaur. After his death, Minos became a judge of the dead in Hades. The Minoan civilization of Crete...

    - King Minos is a former king who is one of the Judges of the Underworld. Nico summons in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    where he pretends to advise him on how to bring Bianca back from the dead he is when really trying to bring himself back. He is also seen as a live king in Percy's dreams/flashbacks. Near the end of the book, it is revealed that he is serving his own dark purpose when he kidnaps Nico and tries to kill Deadalus and use his knowledge. When Daedalus ends up in the Underworld following his sacrifice, King Minos tried to convince the other two judges to punish him and fails.

  • King Sisyphus
    Sisyphus
    In Greek mythology Sisyphus was a king punished by being compelled to roll an immense boulder up a hill, only to watch it roll back down, and to repeat this throughout eternity...

    - A former ruler of Corinth. He had committed violations of guest hospitality, seduced his niece, plotted to kill his brother Salmoneus
    Salmoneus
    In Greek mythology, Salmoneus was the son of Aeolus and Enarete, the brother of Athamas, Sisyphus, Cretheus, Perieres, Deionus, Canace, Alcyone, and Perimede. Salmoneus was the father of Tyro by his first wife Alcidice, the second one being Sidero....

    , and told the River God Asopus
    Asopus
    Asopus or Asôpos is the name of four different rivers in Greece and one in Turkey. In Greek mythology, it was the name of the gods of those rivers.-The rivers in Greece:...

     where Zeus had his daughter. His major crimes involved cheating death twice. The first where he tricked Thanatos into showing him how the chains worked causing Thanatos to be trapped until Ares freed him (Thanatos being trapped displeased Ares since no one in battle could die). The second time was when he complained to Persephone that his wife Merope did not give him a proper funeral and sent Sisyphus' spirit to the living. Even when Sisyphus did not want to return to the Underworld, he was forcefully dragged back there by Hermes. His punishment in The Fields of Punishment was to roll a boulder up a hill, and whenever he failed he would be tempted to try again. He appears in The Demigod Files
    The Demigod Files
    The Demigod Files is a collection of stories by Rick Riordan published on February 10, 2009. It is a companion book to the main series, Percy Jackson and the Olympians. It contains three short stories, titled Percy Jackson and the Stolen Chariot, Percy Jackson and the Bronze Dragon, and Percy...

    in the story titled The Sword of Hades when Percy and Nico ask him advice while Thalia rolls the boulder up the hill. He does not really help them much, but he does say that he helped someone else. He said that he told that other person to go see Melinoe. Therefore, Percy and his friends go to see Melinoe as Sisyphus begs for them to set him free from his punishment as being here was a minor set-back.

  • King Tantalus
    Tantalus
    Tantalus was the ruler of an ancient western Anatolian city called either after his name, as "Tantalís", "the city of Tantalus", or as "Sipylus", in reference to Mount Sipylus, at the foot of which his city was located and whose ruins were reported to be still visible in the beginning of the...

    - Tantalus is the spirit of a king from the Fields of Punishment who is the son of Zeus. He ended up there after killing his son Pelops
    Pelops
    In Greek mythology, Pelops , was king of Pisa in the Peloponnesus. He was the founder of the House of Atreus through his son of that name....

    , cutting him up, and serving him as food to the Gods. His punishment in the Fields of Punishment was to stand under a fruit tree in the middle of a lake where the branches and water would go out of reach from him. He becomes the activities director at Camp Half-Blood after Chiron is fired. He appears in The Sea of Monsters as a minor character. Even when hired as the activities director, he could not eat or drink as the food kept evading him. He is shown to hate Percy and his friends even more than he hates most half-bloods, yet shows favoritism to Clarisse such as naming her hero when the camp was attacked by Colchis Bulls or when she wins the chariot race. He throws a banquet in her honor. When the camp is attacked by a large flock of Stymphalian birds, Tantalus blames it on Percy, Annabeth, and Tyson's "bad chariot driving" despite that they were the ones who defeated the birds. When Tyson is brought to camp, Tantalus insults and makes fun of him even when Tyson is claimed by Poseidon. When at the end of the book, his curse is lifted by Dionysus just before he is sent back to the Underworld as he attempts to take some food along, though none of the campers were sad to see him go.

  • Lityerses
    Lityerses
    In Greek mythology, Lityerses was a son of Midas. He challenged people to harvesting contests and beheaded those he beat. Heracles won the contest and killed him. He was also known as the reaper of men....

    - Lityerses is the son of King Midas. In The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    , he appeared alongside his father.

  • Medea
    Medea
    Medea is a woman in Greek mythology. She was the daughter of King Aeëtes of Colchis, niece of Circe, granddaughter of the sun god Helios, and later wife to the hero Jason, with whom she had two children, Mermeros and Pheres. In Euripides's play Medea, Jason leaves Medea when Creon, king of...

    - A sorceress and granddaughter of Helios that Jason, Piper, and Leo encountered in "The Lost Hero." She is shown as the head of a mall in Chicago that Jason, Piper, and Leo visit. She begins to show the demigods her stock of magic objects and potions, but becomes angry when she hears Jason's name (as he is named after the hero that betrayed her). It quickly becomes evident to Piper that Medea is an agent of Gaia, and the one who Hera had warned them about. Jason and Leo however are entranced by the magic in Medea's voice who tells them to attack and kill one another. Piper managed to bring the two to their senses and they blew up the mall. Medea shouts that she will not be abandoned again causing the three to quickly leave before she makes another attempt to destroy them.

  • Octavian - A descendant of Apollo who works as a senator at Camp Jupiter as seen in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    .

  • Phineas
    Phineas
    In Greek mythology, Phineas was a Phoenician King of Thrace.The name 'Phineas' or 'Phineus' may be associated with the ancient city of Phinea on the Thracian Bosphorus.-Phineas, Son of Agenor:...

    - A blind seer who appears in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    . Percy Jackson finds him in Portland where the Harpies are stealing his food. Before he dies from Gaea making him choose a poisoned cup, he reveals to Percy where Alcyoneus' camp is.

  • Oracle of Delphi
    Pythia
    The Pythia , commonly known as the Oracle of Delphi, was the priestess at the Temple of Apollo at Delphi, located on the slopes of Mount Parnassus. The Pythia was widely credited for her prophecies inspired by Apollo. The Delphic oracle was established in the 8th century BC...

    - Apollo
    Apollo
    Apollo is one of the most important and complex of the Olympian deities in Greek and Roman mythology...

    's Oracle
    Oracle
    In Classical Antiquity, an oracle was a person or agency considered to be a source of wise counsel or prophetic predictions or precognition of the future, inspired by the gods. As such it is a form of divination....

     of Delphi used to reside in the mummified remains of its host until its power was transferred to Rachel Elizabeth Dare in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    . The Oracle's power originally passed from the deceased oracle to a newly chosen oracle; however, at the end of the second world war
    World War II
    World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

    , the oracle gave a Great Prophecy predicting a child of the Big Three (Zeus
    Zeus
    In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

    , Poseidon
    Poseidon
    Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

    , and Hades
    Hades
    Hades , Hadēs, originally , Haidēs or , Aidēs , meaning "the unseen") was the ancient Greek god of the underworld. The genitive , Haidou, was an elision to denote locality: "[the house/dominion] of Hades". Eventually, the nominative came to designate the abode of the dead.In Greek mythology, Hades...

    ) would determine whether or not the gods
    Twelve Olympians
    The Twelve Olympians, also known as the Dodekatheon , in Greek mythology, were the principal deities of the Greek pantheon, residing atop Mount Olympus. Zeus, Hera, Poseidon, Demeter, Hestia, and Hades were siblings. Ares, Hermes, Hephaestus, Athena, Apollo, and Artemis were children of Zeus...

     would be preserved or destroyed. Using this information, the Big Three entered a pact in which none could continue to sire heroes. Before this, Hades bore two young children, Nico di Angelo and Bianca di Angelo. Zeus, fearing that either were the children of the prophecy, destroyed the hotel where the di Angelos lived with his master bolt, killing Maria di Angelo, Hades' lover. In revenge, Hades cursed the Oracle to ensure that the power of the Oracle of Delphi would not pass on to somebody else in hopes that it would soon return to the dust along with its prison. After the Battle of Manhattan in which Hades and Nico successfully assist in the defense of Mount Olympus
    Mount Olympus
    Mount Olympus is the highest mountain in Greece, located on the border between Thessaly and Macedonia, about 100 kilometres away from Thessaloniki, Greece's second largest city. Mount Olympus has 52 peaks. The highest peak Mytikas, meaning "nose", rises to 2,917 metres...

    , Zeus honors the Lord of the Dead. In response to his newfound respect from the other gods, he lifts the curse, allowing the Oracle's power to pass on into Rachel Elizabeth Dare, the last Oracle.

  • Procrustes
    Procrustes
    In Greek mythology Procrustes or "the stretcher [who hammers out the metal]", also known as Prokoptas or Damastes "subduer", was a rogue smith and bandit from Attica who physically attacked people by stretching them or cutting off their legs, so as to force them to fit the size of an iron bed...

    - He is depicted as "Crusty," the owner of a Los Angeles mattress store who appears in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    . He trapped Annabeth and Grover on beds in his mattress store. He ties them up and tries to stretch their spine but he was defeated by Percy.

  • Theseus
    Theseus
    For other uses, see Theseus Theseus was the mythical founder-king of Athens, son of Aethra, and fathered by Aegeus and Poseidon, both of whom Aethra had slept with in one night. Theseus was a founder-hero, like Perseus, Cadmus, or Heracles, all of whom battled and overcame foes that were...

    - When Nico was trying to summon Bianca in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    , he ended up summoning the spirit of Theseus.

Creatures and monsters

  • Antaeus
    Antaeus
    Antaeus in Greek and Berber mythology was a half-giant, the son of Poseidon and Gaia, whose wife was Tinjis. Antaeus had a daughter named Alceis or Barce.-Mythology:...

    - A half-giant who is the son of Poseidon and Gaia. He remained strong while he was on the ground. Percy managed to find a way to get him into the air and defeat him.

  • Argus
    Argus Panoptes
    In Greek mythology, Argus Panoptes or Argos, guardian of the heifer-nymph Io and son of Arestor, was a primordial giant whose epithet "Panoptes", "all-seeing", led to his being described with multiple, often one hundred, eyes. The epithet Panoptes was applied to the Titan of the Sun, Helios, and...

    - Argus is a multi-eyed humanoid who works as a security guard at Camp Half-Blood. He is said to have an eye on this tongue which is why Argus does not talk much.

  • Arion - Arion is Hazel Levesque's horse
    Horse
    The horse is one of two extant subspecies of Equus ferus, or the wild horse. It is a single-hooved mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today...

     who is the child of Poseidon and Demeter. He first appears in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    where Hazel freed him from the Amazons.

  • Aurae - The Aurae are a bunch of wind spirits that work at Camp Jupiter as seen in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    .

  • Automaton
    Automaton
    An automaton is a self-operating machine. The word is sometimes used to describe a robot, more specifically an autonomous robot. An alternative spelling, now obsolete, is automation.-Etymology:...

    - Automatons are like robots, but more highly developed. They have an intricate circuitry in them which makes them hard to fix. Most are made out of normal steel but some like the Bronze dragon are made out of celestial bronze. According to Annabeth, some Automatons in Manhattan were used to either attack or help defend Mount Olympus.
    • Argentium - Reyna's silver Automaton Hound
      Hound
      A hound is a type of dog that assists hunters by tracking or chasing the animal being hunted. It can be contrasted with the gun dog, which assists hunters by identifying the location of prey, and with the retriever, which recovers shot quarry...

       who appears in The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      .
    • Aurum - Reyna's gold Automaton Hound
      Hound
      A hound is a type of dog that assists hunters by tracking or chasing the animal being hunted. It can be contrasted with the gun dog, which assists hunters by identifying the location of prey, and with the retriever, which recovers shot quarry...

       who appears in The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      .

  • Basilisk
    Basilisk
    In European bestiaries and legends, a basilisk is a legendary reptile reputed to be king of serpents and said to have the power to cause death with a single glance...

    - In this series, the Basilisks are little green snakes with colorful spikes and poisonous bites. In The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    , the Basilisks are first seen when Polybotes was walking past Iris' shop R.O.F.L. When the Basilisks attacked Camp Half-Blood, Frank Zhang shapeshifted into what was most likely a mongoose (Percy says he turned into what looked like a weasel, but seemed unsure of himself) to scare them off.

  • Bear
    Bear
    Bears are mammals of the family Ursidae. Bears are classified as caniforms, or doglike carnivorans, with the pinnipeds being their closest living relatives. Although there are only eight living species of bear, they are widespread, appearing in a wide variety of habitats throughout the Northern...

     Twins
    - Agrius and Oreius are humanoid bears that were a result of a union between a woman and a bear due to the power of Aphrodite. The two served as Luke's henchmen in The Sea of Monsters.

  • Bronze Dragon
    Dragon
    A dragon is a legendary creature, typically with serpentine or reptilian traits, that feature in the myths of many cultures. There are two distinct cultural traditions of dragons: the European dragon, derived from European folk traditions and ultimately related to Greek and Middle Eastern...

    - A dragon made of bronze that created by the campers in Hephaestus' cabin to help defend Camp Half-Blood. He is first shown in "Percy Jackson and the Bronze Dragon" story of "The Demigod Files" where Percy, Annabeth, and Silena reactivate it in order to save Charles Beckindorf from the Myrmekes. He was deactivated by Beckendorf with Percy's help afterwards, due to the fact that it was unstable and dangerous. It is fixed by the Hephaestus cabin to protect the camp sometime after this. He is later named "Festus" by Leo Valdez in "The Lost Hero" when Leo found him hidden in the forest. Leo manages to forge some wings onto Festus. Although Festus was sliced to bits by the lasers on King Midas' mansion, Festus' head was recovered by Hephaestus who had his cabin build the Argo II with Festus' head as the figurehead. Festus means Happy in Latin.

  • Centaur
    Centaur
    In Greek mythology, a centaur or hippocentaur is a member of a composite race of creatures, part human and part horse...

    - Half man, half horse. Chiron is a centaur.
    • Party Ponies - They are Chiron's kin. As their name suggests, they are a vast clan-like
      Clan
      A clan is a group of people united by actual or perceived kinship and descent. Even if lineage details are unknown, clan members may be organized around a founding member or apical ancestor. The kinship-based bonds may be symbolical, whereby the clan shares a "stipulated" common ancestor that is a...

       extended family of rowdy centaur
      Centaur
      In Greek mythology, a centaur or hippocentaur is a member of a composite race of creatures, part human and part horse...

      s who reside in the United States with chapters hailing from each respective state. They are key players in two major incidents in the series. In The Sea of Monsters
      The Sea of Monsters
      The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

      , they along with Chiron rescue Percy from Luke during their duel on the Princess Andromeda. In The Last Olympian
      The Last Olympian
      The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

      , they help Chiron and the others fight the major battle between the gods and the Titans.

  • Cerberus
    Cerberus
    Cerberus , or Kerberos, in Greek and Roman mythology, is a multi-headed hound which guards the gates of the Underworld, to prevent those who have crossed the river Styx from ever escaping...

    - The three-headed dog who guards the Underworld entrance to the living. In The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    , he befriends Annabeth. He also appears in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    when he is playing with Mrs. O'Leary. He is the son of Echidna
    Echidna (mythology)
    In Greek mythology, Echidna was half woman half snake, known as the "Mother of All Monsters" because most of the monsters in Greek myth were mothered by her...

     and Typhon
    Typhon
    Typhon , also Typhoeus , Typhaon or Typhos was the last son of Gaia, fathered by Tartarus, and the most deadly monster of Greek mythology. He was known as the "Father of all monsters"; his wife Echidna was likewise the "Mother of All Monsters."Typhon was described in pseudo-Apollodorus,...

    .

  • Charybdis
    Charybdis
    Charybdis or Kharybdis was a sea monster, later rationalised as a whirlpool and considered a shipping hazard in the Strait of Messina.-The mythological background:...

    - One of the two monsters (the other being Scylla) that live on either side of a narrow channel of water. She takes the form of a giant mouth that swallows and releases water, creating whirlpools.

  • Chimera
    Chimera (mythology)
    The Chimera or Chimaera was, according to Greek mythology, a monstrous fire-breathing female creature of Lycia in Asia Minor, composed of the parts of multiple animals: upon the body of a lioness with a tail that ended in a snake's head, the head of a goat arose on her back at the center of her...

    - A three-headed beast that is part lion, part goat, and has a snake-headed tail. It is first seen in the form of a Chihuahua. It confronted Percy atop the St. Louis Arch alongside its mother, Echidna. Overwhelmed by the creature and poisoned by its snake head, Percy was forced to jump into the water far below to escape it. It disappeared after Percy dove into the water.

  • Clazmonian Sow - A flying pig that appeared directly after Hyperion
    Hyperion (mythology)
    Hyperion was one of the twelve Titans of Ancient Greece, the sons and daughters of Gaia and Ouranos , which were later supplanted by the Olympians. He was the brother of Cronus. He was also the lord of light, and the Titan of the east...

     was defeated. Percy defeats it with the help of Blackjack, a statue of Hermes, and the New York Public Library's
    New York Public Library Main Branch
    The Stephen A. Schwarzman Building of the New York Public Library, more widely known as the Main Branch or simply as "the New York Public Library," is the flagship building in the New York Public Library system and a prominent historic landmark in Midtown Manhattan. The branch, opened in 1911, is...

     two stone lion statues.

  • Cloud Nymph
    Nymph
    A nymph in Greek mythology is a female minor nature deity typically associated with a particular location or landform. Different from gods, nymphs are generally regarded as divine spirits who animate nature, and are usually depicted as beautiful, young nubile maidens who love to dance and sing;...

    - Cloud Nymphs are a type of nymph that are associated with the clouds.
    • Fleecy - A Cloud Nymph who appeared in The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      where she works at R.O.F.L.

  • Colchis Bull
    Khalkotauroi
    The Khalkotauroi are mythical creatures that appear in the Greek myth of Jason and the Golden Fleece. They are two immense bulls with bronze hooves and bronze mouths through which they breathe fire. In the Argonautica, Jason is promised the prized fleece by King Aeetes if he can first yoke the...

    - An elephant-sized, fire-breathing bronze bull created by Hephaestus. Their horns are silver and their eyes are rubies. In The Sea of Monsters
    The Sea of Monsters
    The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

    , a bunch of them attacked Camp Half-Blood and are defeated by Tyson. They were later used to make the tracks for the Chariot Race.

  • Cyclops
    Cyclops
    A cyclops , in Greek mythology and later Roman mythology, was a member of a primordial race of giants, each with a single eye in the middle of his forehead...

    - One eyed-giants who have three species as mentioned in The Lost Hero. The first are the elder cyclops, who are friendly, and help the gods, Tyson is one of them. The second is the southern species, who raise Goats and live in caves. Polyphemus is one of them. The third, introduced in The Lost Hero, is the northern group, who helped the Titans make weapons.
    • Ma Gasket - A female cyclops who is the mother of Sump and Torque. She appears in "The Lost Hero" when Jason, Piper, and Leo visit her factory in Detroit.
    • Polyphemus
      Polyphemus
      Polyphemus is the gigantic one-eyed son of Poseidon and Thoosa in Greek mythology, one of the Cyclopes. His name means "much spoken of" or "famous". Polyphemus plays a pivotal role in Homer's Odyssey.-In Homer's Odyssey:...

      - Percy Jackson and his friends encounter him on an island in "The Sea of Monsters." He is shown to be blind and there was also a reference about Odysseus being responsible for blinding him under the alias of "Nobody." He is the main antagonist of The Sea of Monsters
    • Sump - The son of Ma Gasket who appears in "The Lost Hero".
    • Torque - The son of Ma Gasket who appears in "The Lost Hero."

  • Draco Aionius - A bunch of these monsters attacked Camp Half-Blood while Percy Jackson was at the Sea of Monsters.

  • Drakon - A race of giant, millennium-old, serpent-like dragon
    Dragon
    A dragon is a legendary creature, typically with serpentine or reptilian traits, that feature in the myths of many cultures. There are two distinct cultural traditions of dragons: the European dragon, derived from European folk traditions and ultimately related to Greek and Middle Eastern...

    s.
    • Lydian Drakon - The oldest and most fiercest of the Drakons. Kronos unleashed it upon Manhattan where it killed many half-bloods before being killed by Clarisse La Rue.
    • Aitheopian Drakon - One was being raised by Luke in The Sea of Monsters
      The Sea of Monsters
      The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

      . When one of the Bear Twins seemed stubborn on doing a job, Luke threatened him to been fed to the Drakon.

  • Echidna
    Echidna (mythology)
    In Greek mythology, Echidna was half woman half snake, known as the "Mother of All Monsters" because most of the monsters in Greek myth were mothered by her...

    - Part woman, part snake. She is the wife of Typhon and the mother of Cerberus, Chimera, Hydra, Nemean Lion, and Ladon as well as several others not in the series. She is first seen as an old lady that owned the chihuahua that was actually Chimera in disguise. She assisted Chimera in fighting Percy at the top of the St. Louis Arch. She and Chimera disappeared after Percy dove into the water.

  • Empousai
    Empusa
    Empusa is a demigoddess of Greek mythology. In later incarnations she appeared as a species of monsters commanded by Hecate ....

    - Seductive shape-shifting women who are similar in appearance to vampires with both shaggy donkey legs and bronze legs. Two Empusa named Tammi and Kelli, pose as cheerleaders in The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    . In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , the Empousa queen appears as part of the truce party along with Prometheus
    Prometheus
    In Greek mythology, Prometheus is a Titan, the son of Iapetus and Themis, and brother to Atlas, Epimetheus and Menoetius. He was a champion of mankind, known for his wily intelligence, who stole fire from Zeus and gave it to mortals...

     and Ethan Nakumura.

  • Erymanthian Boar
    Erymanthian Boar
    In Greek mythology, the Erymanthian Boar is remembered in connection with The Twelve Labours, in which Heracles, the enemy of Hera, visited in turn "all the other sites of the Goddess throughout the world, to conquer every conceivable 'monster' of nature and rededicate the primordial world to its...

    - A giant boar sent by Pan. Percy, Thalia, Zoë, Grover and Bianca first encounter it in Cloudcroft, New Mexico. Grover is the first to identify it and its potential utility to the team as a form of transportation.

  • Feather-Shooting Bird - A type of large black bird that shoots it's feathers like arrows. In "The Demigod Files," Phobos summons them to fight Clarisse after he steals Ares' war chariot.

  • Fire-Breathing Horse - A fire-breathing horse that is sold at the Triple G Ranch for war purposes. Some are shown to pull Ares' war chariot.

  • Flesh-Eating Horse
    Mares of Diomedes
    The Mares of Diomedes, also called the Mares of Thrace, were four man-eating horses in Greek mythology. Magnificent, wild, and uncontrollable, they belonged to the giant Diomedes , king of Thrace, a son of Ares and Cyrene who lived on the shores of the Black Sea...

    - A bunch of them are seen at the Triple G Ranch. Some of them tried to eat Percy while he was cleaning the stables.

  • Flesh-Eating Sheep - A bunch of carnivorous sheep that are owned by Polyphemus. They help to guard the Golden Fleece. They are as big as a hippopotamus and attack like piranhas.

  • The Furies
    Erinyes
    In Greek mythology the Erinyes from Greek ἐρίνειν " pursue, persecute"--sometimes referred to as "infernal goddesses" -- were female chthonic deities of vengeance. A formulaic oath in the Iliad invokes them as "those who beneath the earth punish whosoever has sworn a false oath"...

    - The Furies are Hades' chief servants and torturers—therefore, they personally searched for Hades's Helm of Darkness, thinking that Percy had stolen it.
    • Alecto
      Alecto
      Alecto is one of the Erinyes in Greek mythology. According to Hesiod, she was the daughter of Gaea fertilized by the blood spilled from Uranus when Cronus castrated him. She is the sister of Tisiphone and Megaera...

      - Alecto acted as Percy's pre-algebra teacher Mrs. Dodds in the first book. She is Hades's main servant. She is also the lawyer that rescued Nico and Bianca Di Angelo from the lotus hotel (mentioned in the last book).
    • Megaera
      Megaera
      Megaera is one of the Erinyes, Eumenides or "Furies" in Greek mythology. Lamprière's Classical Dictionary states "According to the most received opinions, they were three in number, Tisiphone, Megara [sic] and Alecto" and "Megaera .....

      - A Fury that represents grudging.
    • Tisiphone
      Tisiphone
      Tisiphone is the name of two figures in Greek mythology.-Erinyes:Tisiphone was one of the Erinyes or Furies, and sister of Alecto and Megaera. She was the one who punished crimes of murder: parricide, fratricide and homicide...

      - A Fury that represents avenged murder.

  • Gegeines - A race of six-armed giants in leather loincloths that appear in The Lost Hero
    The Lost Hero
    The Lost Hero is a 2010 fantasy-adventure novel written by Rick Riordan and is based on Greek and Roman mythology. It is the first book in the series The Heroes of Olympus, the next series about Camp Half-Blood. It was preceded by the Percy Jackson & the Olympians series, which focused solely on...

    . They are summoned by Enceladus to fight Jason, Piper, and Leo.

  • Geryon
    Geryon
    In Greek mythology, Geryon , son of Chrysaor and Callirrhoe and grandson of Medusa, was a fearsome giant who dwelt on the island Erytheia of the mythic Hesperides in the far west of the Mediterranean. A more literal-minded later generation of Greeks associated the region with Tartessos in southern...

    - In this series, Geryon is described as having a normal head (where his face was weathered and brown from years in the sun, slick black hair, a pencil-thin moustache, two very beefy legs wearing a very large pair of Levis and each of his chests wore a different colored shirt: green, yellow and red. In "The Battle of the Labyrinth," he is the owner of Triple G Ranch with Orthrus guarding the ranch. He gave Percy an impossible task. To clean out the stables of carnivorous horses (one of the tasks Hercules also did). Once Jackson completed the task, Geryon went back on his deal to let his friends free and the two fought. Jackson found Geryon a worthy battle as he was a challenge due to his three hearts which allowed him to be almost impossible to defeat. Jackson defeated Geryon with a well placed arrow (thanks to Hera) that went through Geryon's sides hitting all three hearts at once killing Geryon.

  • Ghoul
    Ghoul
    A ghoul is a folkloric monster associated with graveyards and consuming human flesh, often classified as undead. The oldest surviving literature that mention ghouls is likely One Thousand and One Nights...

    - The Ghouls serve as security guards in the Underworld and make a sound that is similar to bats. They would escort the souls of the wicked to the Fields of Punishment as seen in "The Lightning Thief" when they fly a preacher that had been scamming people there.

  • Giant Badger
    Badger
    Badgers are short-legged omnivores in the weasel family, Mustelidae. There are nine species of badger, in three subfamilies : Melinae , Mellivorinae , and Taxideinae...

    - A giant badger. In "The Last Olympian," it was mentioned that Gleeson Hedge tried to fend off the Giant Badgers and tried to summon Pan to help him in that.

  • Giant Crab
    Crab
    True crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" , or where the reduced abdomen is entirely hidden under the thorax...

    - A giant crab that might be Cancer
    Cancer (astrology)
    Cancer is the fourth astrological sign in the Zodiac. It is considered a water sign and one of four cardinal signs. Cancer is ruled by the Moon. Individuals born when the Sun is in this sign are considered Cancerian individuals...

    . Percy fought it in the Princess Andromeda during his mission with Charlie. He defeated it by stabbing the soft tissue in its belly.

  • Giant Scorpion
    Scorpion
    Scorpions are predatory arthropod animals of the order Scorpiones within the class Arachnida. They have eight legs and are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger...

    - A giant-sized scorpion. Native to desert regions, the giant scorpion may be a descendant of the Brontoscorpio, a species of prehistoric aquatic scorpions from Paleozoic times. Daedalus in the alias of Quintus ordered some Giant Scorpions from Triple G Ranch. He kept them in their boxes in the Sword Fighting Arena. He eventually let them out in the camp's forest for a game.

  • Giant Squid
    Giant squid
    The giant squid is a deep-ocean dwelling squid in the family Architeuthidae, represented by as many as eight species...

    - A giant squid that might be the Kraken
    Kraken
    Kraken are legendary sea monsters of giant proportions said to have dwelt off the coasts of Norway and Iceland.In modern German, Krake means octopus but can also refer to the legendary Kraken...

    . It was among the sea monsters in Oceanus' army.

  • Gorgon
    Gorgon
    In Greek mythology, the Gorgon was a terrifying female creature. The name derives from the Greek word gorgós, which means "dreadful." While descriptions of Gorgons vary across Greek literature, the term commonly refers to any of three sisters who had hair of living, venomous snakes, and a...

    - A Gorgon is a female humanoid creature with snake-like hair. Anyone who looks at the face of the Gorgon turns to stone.
    • Medusa
      Medusa
      In Greek mythology Medusa , " guardian, protectress") was a Gorgon, a chthonic monster, and a daughter of Phorcys and Ceto. The author Hyginus, interposes a generation and gives Medusa another chthonic pair as parents. Gazing directly upon her would turn onlookers to stone...

      - The Gorgon who is the sister of Stheno and Euryale. Under the moniker of "Aunty Em," she attempted to lure Percy, Annabeth, and Grover into a false sense of security and turn them into stone statues. She is defeated, and her severed head is mailed to the gods of Olympus as proof of the trio's courage (though Grover notes that it is more akin to impertinence). Percy's mom uses her head to turn Gabe Ugliano to stone.
    • Stheno
      Stheno
      Stheno , in Greek mythology, was the eldest of the Gorgons, vicious female monsters with brass hands, sharp fangs and "hair" made of living venomous snakes. The daughter of Phorcys and Ceto, she was born in the caverns beneath Mount Olympus...

      - A Gorgon who is the sister of Medusa and Euryale. In "The Lost Hero," she was mentioned to be among the characters who were brought back to life when the Doors of Death opened. Stheno is described by Percy as appearing as a dumpy old grandmother but with rooster feet and bronze boar tusk sticking out of the corners of her mouth.
    • Euryale
      Euryale
      Euryale , in Greek mythology, was the second eldest one of the Gorgons, three vicious sisters with brass hands, sharp fangs, and hair of living, venomous snakes. She and her sister Stheno, unlike their sister, Medusa, were not able to turn any creature to stone with her gaze...

      - A Gorgon who is the sister of Medusa and Stheno.

  • Griffin
    Griffin
    The griffin, griffon, or gryphon is a legendary creature with the body of a lion and the head and wings of an eagle...

    - A Griffin is a creature that is part eagle, part lion. They appear in The Son of Neptune
    The Son of Neptune
    The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

    where they are seen in Alcyoneus' camp.

  • Harpy
    Harpy
    In Greek mythology, a harpy was one of the winged spirits best known for constantly stealing all food from Phineas...

    - Aello ("storm swift"), Celaeno ("the dark") – also known as Podarge ("fleet-foot") – and Ocypete ("the swift wing") are the three harpies that were created by Zeus. They work in Camp Half-Blood as "the cleaning harpies" being allowed to eat any camper who stays in camp past noon in the last day of the summer. The Harpies also cleaned the dishes with super-hot lava and are also good in mid-town traffic.
    • Ella - Ella is a Harpy who appears in The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      . She has red hair and feathers, grey eyes, and a bony structure. She has extensive knowledge about the Romans and their culture. She is very valuable to the enemy side as she might have extensive knowledge of several scrolls that depict Prophecies. She has memorized a lot of books, and often recites a few prophecies from the Sybilline books that Octavian wants badly. It is mentioned towards the end of The Son of Neptune that Ella was going to have to be hidden from Octavian because of her knowledge. She was one of the Harpies that was torturing the blind psychic Phineas. Near the end of the book, it is revealed that Tyson has a crush on her and that she has a crush on Tyson.

  • Hekatonkheires
    Hekatonkheires
    The Hecatonchires, or Hekatonkheires , were figures in an archaic stage of Greek mythology, three giants of incredible strength and ferocity that surpassed that of all Titans whom they helped overthrow. Their name derives from the Greek and , "each of them having a hundred hands and fifty heads"...

    - The Hundred-Handed Giants
    Giant (mythology)
    The mythology and legends of many different cultures include monsters of human appearance but prodigious size and strength. "Giant" is the English word commonly used for such beings, derived from one of the most famed examples: the gigantes of Greek mythology.In various Indo-European mythologies,...

     of incredible strength, superior even to the Cyclopes
    Cyclops
    A cyclops , in Greek mythology and later Roman mythology, was a member of a primordial race of giants, each with a single eye in the middle of his forehead...

    . They are taller than mountain
    Mountain
    Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

    s. The last one, Briares, was imprisoned by Kampê
    Campe
    In Greek mythology, Campe or Kampê is the name of a chthonic female monster .-Mythology:Campe was a dragon with a woman's head and torso and a scorpion-like tail. Nonnus, in Dionysiaca gives the most elaborated description of her...

     in the fourth book. There was also mentionings that his brothers Cottus and Gyges have faded due to people forgetting about them. When Tyson finds that Briares is too afraid to escape, he is heartbroken. At the end, Briares returns helps defeat Luke and the Titans. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , Percy sees Briares helping Poseidon defeat the forces of Oceanus.
    • Briares - He first appears in The Battle of the Labyrinth
      The Battle of the Labyrinth
      The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

      when Percy, Annabeth, Tyson
      Tyson the Cyclops
      Tyson is a fictional character in Rick Riordan's Percy Jackson and the Olympians series. He is a cyclops and the half brother of the protagonist of the series, Percy Jackson, with whom he shares a father, Poseidon. He first appears as a homeless boy in the second book of the series, The Sea of...

      , and Grover
      Grover Underwood (Percy Jackson)
      Grover Underwood is a fictional character in Rick Riordan's Percy Jackson and the Olympians series. He is a satyr, a mythological Greek being that is half goat and half human. He has the upper body of a human and the legs and horns of a goat. He wears jeans or false feet with sneakers when he wants...

       rescue him from Alcatraz, where he is being held prisoner by Kampê. Briares is one of the three Hekatonkheires ("the Hundred-Handed Ones"), elder brothers to the Cyclopes
      Cyclops
      A cyclops , in Greek mythology and later Roman mythology, was a member of a primordial race of giants, each with a single eye in the middle of his forehead...

      . His siblings are Kottos and Gyes. Like all other Hundred-Handed Ones, he has fifty different "faces" indicative of his moods. He is very frightened and timid due to his years of imprisonment and feels that he is of no use. Because of this, he runs away from Percy and his companions in the maze-like Labyrinth. However, Daedalus
      Daedalus
      In Greek mythology, Daedalus was a skillful craftsman and artisan.-Family:...

       finds him and they both show up to fight for the Olympians in the battle at Camp Half-Blood at the end of The Battle of the Labyrinth
      The Battle of the Labyrinth
      The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

      . Briares seizes the chance to bury Kampê under a pile of rocks. At the end of The Battle of the Labyrinth
      The Battle of the Labyrinth
      The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

      , he goes to help the Cyclopes in Poseidon's forge. In The Last Olympian
      The Last Olympian
      The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

      , Briares is shown fighting alongside Poseidon.

  • Hellhound
    Hellhound
    A hellhound is a supernatural dog, found in folklore. A wide variety of ominous or hellish supernatural dogs occur in mythologies around the world, similar to the ubiquitous dragon...

    s
    - Hellhounds are a main part of Luke's army and monsters in general. They are described as very large black dogs that have fire glowing in their eyes. They were also mentioned to reside in the Fields of Punishment. Daedalus owns a hound named Mrs. O'Leary, who, unlike her relatives, is loving and loyal.
    • Mrs. O'Leary - Mrs. O'Leary is the only friendly hellhound
      Hellhound
      A hellhound is a supernatural dog, found in folklore. A wide variety of ominous or hellish supernatural dogs occur in mythologies around the world, similar to the ubiquitous dragon...

       to ever exist. Quintus (Daedalus
      Daedalus
      In Greek mythology, Daedalus was a skillful craftsman and artisan.-Family:...

      ) was her original owner, but, after asking Nico Di Angelo to kill him, Percy becomes the hellhound's owner. While Percy is in the "mortal world", Charles Beckendorf takes care of her at Camp Half-Blood. She rescues Percy while in the Labryrinth.

  • Hippalectryon
    Hippalectryon
    A hippalectryon is a type of fantastic hybrid creature of Ancient Greek folklore, half-horse and half-rooster, with yellow feathers...

    s
    – The Hippalektryons are an endangered animal that is part chicken, part horse. In "Battle of the Labyrinth," they are seen at the Triple G Ranch.

  • Hippocamp
    Hippocamp
    The hippocamp or hippocampus , often called a sea-horse in English, is a mythological creature shared by Phoenician and Greek mythology, though the name by which it is recognised is purely Greek; it became part of Etruscan mythology...

    us
    – Hippocampi are from waist up stallion horses and from waist down have a fish tail. One is said to take a liking to Tyson, and soon enough he named it Rainbow. They are also called "fish ponies" by Tyson.
    • Rainbow - A Hippocamus who befriends Tyson in "The Sea of Monsters. Loves to give Tyson rides all over the sea."

  • Hyperboreans - Ice giants who freeze into ice when defeated. They side with Kronos in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    .

  • Hydra
    Lernaean Hydra
    In Greek mythology, the Lernaean Hydra was an ancient nameless serpent-like chthonic water beast, with reptilian traits, that possessed many heads — the poets mention more heads than the vase-painters could paint, and for each head cut off it grew two more — and poisonous breath so virulent even...

    - A monster with nine heads. Every time a head is chopped off, two new heads grow back. This monster appears in The Sea of Monsters where its life force is linked to the Monster Doughnut Shop as another one pops up every time the Hydra regrows a head. In The Lightning Thief film, the creature takes the form of five janitors in the Parthenon replica in Tennessee and refers himself as "We" and is ultimately defeated by the use of Medusa's head.

  • Kampê
    Campe
    In Greek mythology, Campe or Kampê is the name of a chthonic female monster .-Mythology:Campe was a dragon with a woman's head and torso and a scorpion-like tail. Nonnus, in Dionysiaca gives the most elaborated description of her...

    - A snake-haired, centauroid creature
    Hybrid (mythology)
    Hybrids are mythological creatures combining body parts of more than one real species.They can be classified as partly human hybrids , and non-human hybrids combining two or more animal species...

     that is half-woman, half dragon with wings and the heads of various mutated wild animals growing from her human torso. She is a monster that imprisoned the Hundred-Handed Ones and Cyclopes during the First Great War. She is feared by all, and is defeated by Briares in the "Battle of the Labyrinth" by being crushed by boulders.

  • Keres
    Keres (mythology)
    In Greek mythology, the Keres were female death-spirits. The Keres were daughters of Nyx, and as such the sisters of Fate , Doom , Death and Sleep , Strife , Old Age , Divine Retribution , Charon, and other personifications...

    - A bunch of battlefield spirits of famine and disease that feed on violent deaths. They reside in the Underworld and support the Titans but do not assist them in "The Last Olympian." In "The Demigod Files," a bunch of them attacked Percy, Thalia, and Nico where one of them poisoned Percy. Lucky for him, Bob the Titan managed to heal him.

  • Keto
    Cetus (mythology)
    In ancient Greek, the word ketos - Latinized as cetus - denotes a large fish, a whale, a shark, or a sea monster. The sea monsters slain by Perseus and Heracles were each referred to as a cetus by ancient sources. The term cetacean originates from cetus. In Greek art, cetea were depicted as...

    - Chiron mentions this giant sea monster in "The Titan's Curse".

  • Ladon
    Ladon (mythology)
    Ladon was the serpent-like dragon that twined and twisted around the tree in the Garden of the Hesperides and guarded the golden apples. He was overcome by Heracles...

    - The giant dragon
    Dragon
    A dragon is a legendary creature, typically with serpentine or reptilian traits, that feature in the myths of many cultures. There are two distinct cultural traditions of dragons: the European dragon, derived from European folk traditions and ultimately related to Greek and Middle Eastern...

     who is one of the offspring of Echidna. It defends the Hesperides' apple tree. Ladon poisons Zoë Nightshade in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    .

  • Laistrygonians
    Laestrygonians
    The Laestrygonians are a tribe of giant cannibals from ancient Greek mythology. Odysseus, the main character of Homer's Odyssey, visited them during his journey back home to Ithaca...

    - Large, muscular cannibals who serve as the brawn of Kronos's army. Known Laistrygonians in the series are Joe Bob, Marrow Sucker, and Skull Eater.

  • Leviathan
    Leviathan
    Leviathan , is a sea monster referred to in the Bible. In Demonology, Leviathan is one of the seven princes of Hell and its gatekeeper . The word has become synonymous with any large sea monster or creature...

    - These are mentioned by Poseidon in "The Last Olympian" as sea giants neutral in the war between Poseidon and Oceanus.

  • Lotus-Eaters
    Lotus-eaters
    In Greek mythology, the lotus-eaters , also referred to as the lotophagi or lotophaguses or lotophages , were a race of people living on an island near North Africa dominated by lotus plants...

    - A bunch of them run the Lotus Hotel and Casino in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    .

  • Manticore
    Manticore
    The manticore is a legendary creature similar to the Egyptian sphinx. It has the body of a red lion, a human head with three rows of sharp teeth , and a trumpet-like voice. Other aspects of the creature vary from story to story. It may be horned, winged, or both...

    - These monsters have human faces and the bodies of lions as well as thorny tails. Dr. Thorn is a manticore.
    • Dr. Thorn - He is a manticore in the form of the vice principal of Westover Hall, the school that Bianca and Nico di Angelo attended. He has two eyes of different colors, one blue and one brown. His nostrils flare up when he talks.

  • Minotaur
    Minotaur
    In Greek mythology, the Minotaur , as the Greeks imagined him, was a creature with the head of a bull on the body of a man or, as described by Roman poet Ovid, "part man and part bull"...

    - The Minotaur is part-man, part bull. The monster of the labyrinth that chased Percy all the way to Camp Half-Blood. He defeats the monster atop Half-Blood hill and claims its broken horn as a spoil of war. The Minotaur returns in The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    as a general for Kronos's army at Williamsburg Bridge
    Williamsburg Bridge
    The Williamsburg Bridge is a suspension bridge in New York City across the East River connecting the Lower East Side of Manhattan at Delancey Street with the Williamsburg neighborhood of Brooklyn at Broadway near the Brooklyn-Queens Expressway...

     and now wearing armor. It was defeated by Percy again. In the film adaption, the Minotaur's head resembles a Cape Buffalo's
    African Buffalo
    The African buffalo, affalo, nyati, Mbogo or Cape buffalo is a large African bovine. It is not closely related to the slightly larger wild Asian water buffalo, but its ancestry remains unclear...

     head.

  • Myrmekes - A race of giant ant-like creatures that like shiny things like gold. In "The Demigod Files," A bunch of Myrmekes trapped Charles Beckendorf in their nest.

  • Nemean Lion
    Nemean Lion
    The Nemean lion was a vicious monster in Greek mythology that lived at Nemea. It was eventually killed by Heracles. It could not be killed with mortal weapons because its golden fur was impervious to attack...

    - A lion that is one of the children of Echidna and Typhon. Luke and Atlas sent the Nemean Lion to the National Air and Space museum to stop the group of questing Hunters and Demigods. It battled with Percy Jackson, but was hard to defeat because of its bulletproof and sword-proof pelt. Percy eventually defeated it by throwing astronaut food into its mouth to expose its one unprotected surface, its mouth.

  • Ophiotaurus
    Ophiotaurus
    In Greek mythology, the Ophiotaurus was a creature that was part bull and part serpent. Its sole reference is found in Ovid's Fasti , where the creature's entrails were said to grant the power to defeat the gods to whoever burned them...

    - A half-cow/half-snake monster. It is an ancient monster that could bring down the gods if it was slain and its entrails were sacrificed. It was nicknamed Bessie by Percy Jackson who initially assumed it was female, although Grover later informed him that it was a male. Percy saved it from a trawler's net after being fetched by the Hippocampi.
    • Bessie - Bessie is the Ophiotaurus that Percy meets in "The Titan's Curse." Percy named it because of its bovine appearance, but it was in fact a male. Bessie was supposedly the creature that Artemis
      Artemis
      Artemis was one of the most widely venerated of the Ancient Greek deities. Her Roman equivalent is Diana. Some scholars believe that the name and indeed the goddess herself was originally pre-Greek. Homer refers to her as Artemis Agrotera, Potnia Theron: "Artemis of the wildland, Mistress of Animals"...

       was hunting because it could destroy Olympus. She also briefly appeared in "The Last Olympian" where Percy sees him in an aquarium.

  • Orthrus
    Orthrus
    In Greek mythology, Orthrus or Orthus was a two-headed dog and a doublet of Cerberus, both whelped by the chthonic monsters Echidna and Typhon.He was owned by the three-bodied giant, Geryon...

    - A two-headed dog owned by Geryon.

  • Pegasus
    Pegasus
    Pegasus is one of the best known fantastical as well as mythological creatures in Greek mythology. He is a winged divine horse, usually white in color. He was sired by Poseidon, in his role as horse-god, and foaled by the Gorgon Medusa. He was the brother of Chrysaor, born at a single birthing...

    - Pegasi are winged horses.
    • Blackjack - He is the pure black version of Pegasus and Percy's loyal friend. He is first introduced in the second book The Sea of Monsters
      The Sea of Monsters
      The Sea of Monsters is a fantasy-adventure novel based on Greek mythology written by Rick Riordan published in 2006. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief...

      on the Princess Andromeda, Luke's demon cruise ship, where Percy rescued him from Kronos's minions. Ever since then, Blackjack has felt like he has to pay Percy back for saving him and he does whatever Percy asks.
    • Guido - A Pegasus who is friends with Blackjack. In "The Last Olympian," Guido and Porkpie aided Percy and Blackjack in the Battle of Manhattan.
    • Porkpie - A Pegasus who is friends with Blackjack. In "The Last Olympian," Guido and Porkpie aided Percy and Blackjack in the Battle of Manhattan.
    • Scipio - Reyna's Pegasus who appears in The Son of Neptune
      The Son of Neptune
      The Son of Neptune is the second book in the Heroes of Olympus series written by Rick Riordan. It was released on October 4, 2011.-Development:...

      .

  • Peleus - A dragon that guards the tree that Thalia was previously within.

  • Pit Scorpion
    Scorpion
    Scorpions are predatory arthropod animals of the order Scorpiones within the class Arachnida. They have eight legs and are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger...

    - A deadly type of scorpion that appears in "The Lightning Thief." When Luke brings Percy into the woods and reveals his allegiance to Kronos, he summoned a Pit Scorpion to attack Percy. He tells Percy he should not go for his sword, as the pit scorpion can kill in 60 seconds, and can jump up to fifteen feet. When Luke disappears, Percy manages to kill it even though it managed to sting him. With the help of the wood nymphs, Percy recovered from its poison.

  • Satyr
    Satyr
    In Greek mythology, satyrs are a troop of male companions of Pan and Dionysus — "satyresses" were a late invention of poets — that roamed the woods and mountains. In myths they are often associated with pipe-playing....

    - Half man, half goat
    Goat
    The domestic goat is a subspecies of goat domesticated from the wild goat of southwest Asia and Eastern Europe. The goat is a member of the Bovidae family and is closely related to the sheep as both are in the goat-antelope subfamily Caprinae. There are over three hundred distinct breeds of...

    . Grover Underwood is also a satyr.
    • Coach Gleeson Hedge - He is a satyr. Grover made a reference to him in "The Last Olympian" where he tried to summon Pan's spirit to help fend off some badgers. He played a part in the "Heroes of Olympus" series.
    • Ferdinand - Ferdinand is Grover's uncle who was one of the victims of Medusa in the Garden Gnome Emporium. When Kronos' army was hiding out there in "The Last Olympian," his statue form is now missing an arm and has graffiti on it without Medusa watching over it.
    • Leneus - Leneus is a satyr who is a member of the Council of Cloven Elders. He is killed in The Last Olympian
      The Last Olympian
      The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

      and is reincarnated as a laurel
      Bay Laurel
      The bay laurel , also known as sweet bay, bay tree, true laurel, Grecian laurel, laurel tree, or simply laurel, is an aromatic evergreen tree or large shrub with green, glossy leaves, native to the Mediterranean region. It is the source of the bay leaf used in cooking...

      . He hates Grover and thinks he is a liar. When he dies, Grover takes his spot in the Council of Cloven Elders.
    • Maron - Maron is a satyr who is member of the Council of Cloven Elders. He only appears in book four, when he, Silenus and Leneus try to exile Grover because they think that Pan, the god of the wild, is still alive and Grover is a just lying about his death. He and the other members of the Council are described as being old and fat satyrs.
    • Silenus
      Silenus
      In Greek mythology, Silenus was a companion and tutor to the wine god Dionysus.-Evolution of the character:The original Silenus resembled a folklore man of the forest with the ears of a horse and sometimes also the tail and legs of a horse...

      - Silenus is a satyr appearing in books four and five. He is the leader of the Council of Cloven Elders and is shown to hate Grover, calling him an "outcast" and a "liar". that he has suspicions that he is a spy.

  • Scylla
    Scylla
    In Greek mythology, Scylla was a monster that lived on one side of a narrow channel of water, opposite its counterpart Charybdis. The two sides of the strait were within an arrow's range of each other—so close that sailors attempting to avoid Charybdis would pass too close to Scylla and vice...

    - One of the two monsters (the other being Charybdis) that live on either side of a narrow channel of water in The Sea of Monsters. Should a ship sail too close to her, she uses her six heads to pluck off crew members on deck and devour them. According to Clarisse (daughter of Ares), if the crew hid below deck, Scylla would just pick up the whole boat and crush it.

  • Scythian Dracaenae
    Drakaina (mythology)
    In Greek mythology, a drakaina is a female dragon, sometimes with human-like features. Examples included Campe, Ceto, Delphyne, Echidna, Scylla, Lamia , Poine, and Python ....

    - A race of humanoid femals with twin snake tails in place of legs. They make up a considerable portion of the Titan Lord's forces.
    • Queen Sess - The Queen of the Scythian Dracaenae who appears in "The Last Olympian." She fought Chiron alongside Kronos and was killed when Chiron fired one of his arrows in between Queen Sess' eyes.

  • Sea Serpent
    Sea serpent
    A sea serpent or sea dragon is a type of sea monster either wholly or partly serpentine.Sightings of sea serpents have been reported for hundreds of years, and continue to be claimed today. Cryptozoologist Bruce Champagne identified more than 1,200 purported sea serpent sightings...

    - One was seen amongst the sea monsters in Oceanus' army. Deimos is seen riding one in "The Stolen Chariot."

  • Siren
    Siren
    In Greek mythology, the Sirens were three dangerous mermaid like creatures, portrayed as seductresses who lured nearby sailors with their enchanting music and voices to shipwreck on the rocky coast of their island. Roman poets placed them on an island called Sirenum scopuli...

    s
    - Dangerous bird-women whose sweet songs have led many sailors to watery deaths. Their hymn is almost Annabeth's undoing.

  • Skeleton
    Skeleton (undead)
    A Skeleton is a type of physically manifested undead often found in fantasy, gothic and horror fiction, and mythical art. Most are human skeletons, but they can also be from any creature or race found on Earth or in the fantasy world.- Myth and folklore :...

    - Skeletons were used by various people like Hades. In "The Lightning Thief," Hades had skeletons in army uniforms guarding his palace. In "The Battle of the Labyrinth," Nico manages to employ them as part of a ritual that will enable him to call the spirit of his sister to speak with her. In "The Last Olympian," Nico and Hades manages to bring a bunch of Skeletons to help fight the Titans. They are later seen constructing a cabin at Camp Half-Blood that is dedicated to Hades.
    • Skeleton Warriors
      Skeleton warrior
      Skeleton warriors are a common fictional monster archetype common in western fantasy literature, television, and video games. They consist of animated human skeletons with human weapons and armor such as swords and shields. Because they are already dead, skeleton warriors can be very difficult to...

      - A bunch of skeletons armed with weapons. In "The Titan's Curse," some skeleton warriors ambushed Percy, Thalia, Zoe, Grover, and Bianca in New Mexico. Due to her being a child of Hades, Bianca managed to destroy them.

  • Sphinx
    Sphinx
    A sphinx is a mythical creature with a lion's body and a human head or a cat head.The sphinx, in Greek tradition, has the haunches of a lion, the wings of a great bird, and the face of a woman. She is mythicised as treacherous and merciless...

    - A Sphinx is a monster with the head of a woman and the body of a lion. Percy Jackson and his friends encountered the Sphinx while navigating the labyrinth. Rather than tell riddles, the Sphinx asked historical questions.

  • Stymphalian Birds
    Stymphalian birds
    In Greek mythology, the Stymphalian birds were man-eating birds with beaks of bronze and sharp metallic feathers they could launch at their victims, and were sacred to Ares, the god of war. Furthermore, their dung was highly toxic...

    - A flock of birds once attacked Camp Half-Blood in The Sea of Monsters. Percy and Annabeth used Chiron's music so Apollo's cabin could shoot them down.

  • Sybaris
    Sybaris (mythology)
    Sybaris was a drakaina of Greek mythology. Dwelling on Mount Kriphis, Sybaris terrorized the countryside of Delphi, devouring livestock and people. The people of the region asked the oracle how to end the depredations. The oracle answered that a young man needed to be sacrificed to the dragon...

    - In "The Titan's Curse," Atlas used her teeth to create Skeletons.

  • Talos
    Talos
    In Greek mythology, Talos or Talon was a giant man of bronze who protected Europa in Crete from pirates and invaders by circling the island's shores three times daily while guarding it.- History :...

    - Talos is a giant automaton. Percy, Thalia, and Bianca fight a prototype of Talos in the Junkyard of the Gods. Apparently, he has a manhole at the base of his foot for 'servicing'. Bianca went in to mess up his circuit so they could beat him. He fell on some power lines thus electrocuting Bianca.

  • Telekhine
    Telchines
    In Greek mythology, the Telchines were the original inhabitants of the island of Rhodes, and were known in Crete and Cyprus....

    s
    - Dog-faced sea demons that reforged Kronos's blade in the fourth book. Some set Percy on fire in the fourth book. They also appear in the fifth book. In the fourth book, they are referred to as "telekhines", however in the fifth book, they are referred to as "telkhines", without the second "e". This may be a typographical error
    Typographical error
    A typographical error is a mistake made in, originally, the manual type-setting of printed material, or more recently, the typing process. The term includes errors due to mechanical failure or slips of the hand or finger, but usually excludes errors of ignorance, such as spelling errors...

     or something different of the author's choice.

  • Trojan Sea Monster
    Sea monster
    Sea monsters are sea-dwelling mythical or legendary creatures, often believed to be of immense size.Marine monsters can take many forms, including sea dragons, sea serpents, or multi-armed beasts. They can be slimy or scaly and are often pictured threatening ships or spouting jets of water...

    - In "The Lost Hero," Aeolus mentioned that Jason once slayed this monster.

  • Typhon
    Typhon
    Typhon , also Typhoeus , Typhaon or Typhos was the last son of Gaia, fathered by Tartarus, and the most deadly monster of Greek mythology. He was known as the "Father of all monsters"; his wife Echidna was likewise the "Mother of All Monsters."Typhon was described in pseudo-Apollodorus,...

    - A very powerful monster. He sired many monsters by Echidna. He lives and sleeps inside Mount Saint Helens. Percy is such a powerful demigod
    Demigod
    The term "demigod" , meaning "half-god", is commonly used to describe mythological figures whose one parent was a god and whose other parent was human; as such, demigods are human-god hybrids...

     that he almost wakes Typhon
    Typhon
    Typhon , also Typhoeus , Typhaon or Typhos was the last son of Gaia, fathered by Tartarus, and the most deadly monster of Greek mythology. He was known as the "Father of all monsters"; his wife Echidna was likewise the "Mother of All Monsters."Typhon was described in pseudo-Apollodorus,...

     during his visit there. In The Last Olympian
    The Last Olympian
    The Last Olympian is a fantasy-adventure novel based on Greek mythology by Rick Riordan, published on May 5, 2009. It is the fifth and final novel in the Percy Jackson & the Olympians series and serves as the direct sequel to The Battle of the Labyrinth...

    , he awakes and moves across America and destroys everything in his path. Due to him being concealed in mist, Typhon's appearance is not described and appears as a freak storm. The gods of Olympus
    Mount Olympus
    Mount Olympus is the highest mountain in Greece, located on the border between Thessaly and Macedonia, about 100 kilometres away from Thessaloniki, Greece's second largest city. Mount Olympus has 52 peaks. The highest peak Mytikas, meaning "nose", rises to 2,917 metres...

     try to stop him, but he is too powerful. In the end, Poseidon and his army help defeat him where Poseidon opened up a tunnel that sent Typhon into Tartarus. Once Typhon was defeated, a wave of Venti were born.

  • Venti - A race of storm spirits that were born when Poseidon opened a tunnel that sent Typhon into Tartarus. Depending on how chaotic they are, Venti can appear as either smokey men with angel-like wings or smokey horses.

  • Werewolf
    Werewolf
    A werewolf, also known as a lycanthrope , is a mythological or folkloric human with the ability to shapeshift into a wolf or an anthropomorphic wolf-like creature, either purposely or after being placed under a curse...

    - A werewolf is a creature that is part man, part wolf. In "The Lost Hero," King Lycaon led a pack of werewolves to kill Leo and Piper. Most of the werewolves were defeated by the Hunters of Artemis.

  • Wood Nymph
    Nymph
    A nymph in Greek mythology is a female minor nature deity typically associated with a particular location or landform. Different from gods, nymphs are generally regarded as divine spirits who animate nature, and are usually depicted as beautiful, young nubile maidens who love to dance and sing;...

    - Wood Nymphs are a type of Nymphs that are associated with specific lands.
    • Juniper - Juniper is a tree nymph
      Nymph
      A nymph in Greek mythology is a female minor nature deity typically associated with a particular location or landform. Different from gods, nymphs are generally regarded as divine spirits who animate nature, and are usually depicted as beautiful, young nubile maidens who love to dance and sing;...

      . She is Grover Underwood's girlfriend
      Girlfriend
      Girlfriend is a term that can refer to either a female partner in a non-marital romantic relationship or a female non-romantic friend that is closer than other friends....

      , and in "The Battle of the Labyrinth
      The Battle of the Labyrinth
      The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

      ", she informs Percy that she has seen Luke Castellan using the entrance to the Labyrinth and that she has also seen Quintus/Daedalus using the entrance to the Labyrinth.

Mortals

  • Darrin - One of the many people in the Lotus Casino. He is described as about thirteen, and "some Elvis impersonator
    Elvis impersonator
    An Elvis impersonator is someone who impersonates or copies famed American musician Elvis Presley. Professional Elvis impersonators can work all over the world as entertainers, and such tribute acts are in great demand due to the unique iconic status of Elvis...

    's son". Percy meets him at a Virtual reality
    Virtual reality
    Virtual reality , also known as virtuality, is a term that applies to computer-simulated environments that can simulate physical presence in places in the real world, as well as in imaginary worlds...

     shooter game. He has apparently been in the Lotus Casino since 1977.

  • Gabriel "Gabe" Ugliano - Known as "Smelly Gabe," he was Percy's stepfather. In appearance, he is heavy and bald, wearing thrift store clothes often. He managed the Electronics Mega-Mart in Queens as an occupation. As Percy described him in The Lightning Thief
    The Lightning Thief
    The Lightning Thief is a 2005 fantasy-adventure novel based on Greek mythology, the first young adult novel written by Rick Riordan. It is the first novel in the Percy Jackson & the Olympians series, which charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a...

    , he "was nice the first thirty seconds we knew him, then showed his true colors as a world-class jerk." During summer break from school, Gabe asks him for money for beer and for his poker games with his friends. Supposedly he can easily guess how much money a person has. It is implied that, at least once, he hit Percy's mother. Grover later tells Percy that Sally (Percy's mother) married Gabe to protect Percy from monsters who would have tracked him down otherwise. He smelled so "repulsively human" that his smell hid Percy's demigod scent from monsters. If she had not married him, monsters would have found Percy sooner. At the end of Book 1, he is turned to stone by Percy's mother (using Medusa
    Medusa
    In Greek mythology Medusa , " guardian, protectress") was a Gorgon, a chthonic monster, and a daughter of Phorcys and Ceto. The author Hyginus, interposes a generation and gives Medusa another chthonic pair as parents. Gazing directly upon her would turn onlookers to stone...

    's severed head) and sold as a statue called "The Poker Player" earning lots of money in the process.

  • May Castellan - Luke's mother who attempted to become the Oracle. Since Hades's power prevented her from taking it, she was driven crazy and instead received small glimpses of her son's terrible future. She made huge amounts of sandwiches, burnt cookies, and Kool-Aid
    Kool-Aid
    Kool-Aid is a brand of flavored drink mix owned by the Kraft Foods Company.-History:Kool-Aid was invented by Edwin Perkins in Hastings, Nebraska, United States. All of his experiments took place in his mother's kitchen. Its predecessor was a liquid concentrate called Fruit Smack...

     for Luke, believing that someday he would return home. She also gave him a blessing to receive the curse of Achilles. It was shown that she had numerous clippings of Hermes from advertisements and many beanbag monsters sitting in the house and on the front lawn.

  • Dr. Frederick Chase - Annabeth's father. He first appears in The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    . He allows Percy, Thalia and Zoë to borrow his car to drive to Mount Tamalpais
    Mount Tamalpais
    Mount Tamalpais is a peak in Marin County, California, United States, often considered symbolic of Marin County. Much of Mount Tamalpais is protected within public lands such as Mount Tamalpais State Park and the Mount Tamalpais Watershed.-Geography:...

     (Mount Othrys
    Mount Othrys
    Mount Othrys is a mountain in Central Greece in the northeastern part of Fthiotis and southern part of Magnesia. The mountaintop is at the prefectural and the regional border at 1,728 m. Much of the area is unpopulated in the northern part and the southwestern part...

    ). Annabeth's father is a professor of military history. During The Titan's Curse, he was studying the Third Battle of Ypres. He owns a Sopwith Camel
    Sopwith Camel
    The Sopwith Camel was a British First World War single-seat biplane fighter introduced on the Western Front in 1917. Manufactured by Sopwith Aviation Company, it had a short-coupled fuselage, heavy, powerful rotary engine, and concentrated fire from twin synchronized machine guns. Though difficult...

    . He and his daughter had a lot of disagreements in the past, which is why she ran away from home when she was seven years old. He lives in San Francisco with his wife and two sons, Bobby and Matthew. In The Titan's Curse, he battles the monsters on the Princess Andromeda with bullets melded with celestial bronze.

  • Mrs. Dare - Rachel's mother. She briefly appears in The Last Olympian. She went to Clarion Ladies' Academy, a finishing school for society girls in New Hampshire, and wants Rachel to go there as well.

  • Ms. Grace - Mother to Jason and Thalia Grace, and the first known mortal to bear children of different aspects of the same God, Zeus/Jupiter.

  • Paul "Blowfish" Blofis - Sally Jackson's boyfriend and later husband, and thus Percy's stepfather. Percy and his mother reveal to Paul the truth, and at first he only half believes them. When Percy, Nico, and Mrs. O'Leary come unexpectedly into Sally's apartment, Paul fully believes, and thinks it's "awesome!". Paul turns out to be an excellent swordsman due to the fact that he was a Shakespearian actor in college and assists in the fight to save Olympus in The Last Olympian. He asks Percy for permission before proposing to Percy's mother.

  • Preacher - A preacher who raised money supposedly for orphans and spent it instead on his mansion until he was caught by the police. He died in a police chase when he drove his "Lamborghini
    Lamborghini
    Automobili Lamborghini S.p.A., commonly referred to as Lamborghini , is an Italian car manufacturer. The company was founded by manufacturing magnate Ferruccio Lamborghini in 1963, with the objective of producing a refined grand touring car to compete with established offerings from marques like...

     for the Lord" off a cliff. He was carried off to the Fields of Punishment by some ghouls in the Greek Underworld. The Preacher believed himself to be in Hell
    Hell
    In many religious traditions, a hell is a place of suffering and punishment in the afterlife. Religions with a linear divine history often depict hells as endless. Religions with a cyclic history often depict a hell as an intermediary period between incarnations...

    .

  • Rachel Elizabeth Dare - A clear-sighted mortal girl who is able to see through the Mist. She is first encountered by Percy during The Titan's Curse
    The Titan's Curse
    The Titan's Curse is a 2007 fantasy-adventure novel based on Greek mythology written by Rick Riordan. It is the third novel in the Percy Jackson & the Olympians series and the sequel to The Sea of Monsters...

    as he flees from the skeletons summoned by Atlas. After mistaking her for a monster and realizing she is human, Percy discovers that she can see through the mist. She leads the skeletons away from Percy. Rachel goes to the same school as Percy in "The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    ," realizing that the cheerleaders are actually empousai. In The Battle of the Labyrinth
    The Battle of the Labyrinth
    The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan...

    , she aids Annabeth and Percy by guiding them through the labyrinth to Daedalus
    Daedalus
    In Greek mythology, Daedalus was a skillful craftsman and artisan.-Family:...

    's workshop. From there she, Percy, Annabeth, and Nico escape, only to enter again to locate Grover and Tyson. She is present at the deathbed of Lord Pan
    Pan (mythology)
    Pan , in Greek religion and mythology, is the god of the wild, shepherds and flocks, nature, of mountain wilds, hunting and rustic music, as well as the companion of the nymphs. His name originates within the Greek language, from the word paein , meaning "to pasture." He has the hindquarters, legs,...

     and, like the others, takes part of his essence within her. By throwing her hairbrush at Kronos, she provided enough of a distraction for Percy to escape the Titan Lord's time manipulation. It is hinted throughout the series that she harbors romantic feelings for Percy. In The Last Olympian, she begins having strange visions and becomes the new Oracle of Delphi after Hades's curse is lifted, under the guidance of Chiron and Apollo. Her first act as the Oracle is to deliver the Great Prophecy of the next generation of heroes.

  • Sally Jackson - The daughter of Jim and Laura Jackson. She is the mother of Percy and she was married to "Smelly" Gabe." She then turned him to stone with the head of Medusa, and married Paul Blofis in the fifth book. In the beginning of the series, it is indicated that Sally works at a candy shop called "Sweet on America" and said that she wanted to be an author when she was young. In the third book, Percy guesses that Sally can see through the Mist and he believes that this was probably the reason Poseidon took interest in her. In the first book, she was thought to be killed by the Minotaur. Later on, it was discovered that she survived and that she was still alive in the clutches of Hades. She was freed once Percy gave the Helm of Darkness (which was also stolen by Luke) to the Furies.

  • William Dare - He is Rachel Elizabeth Dare's father, who first appears in The Last Olympian. He owns a land developing company and is very wealthy. His family lives in a mansion in Brooklyn
    Brooklyn
    Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated...

    , where Rachel lives on the top floor. Rachel hates her father because of his job, but he seems to care about her. He said that he and her mother had really been looking forward to the vacation, but, according to Rachel, they both hate the beach, and are just too stubborn to admit it. He supported Rachel's going to finishing school. He walked into Rachel's room in Percy's dream, wearing pajamas with "WD" monogrammed on the pocket.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK