is a character in Magical Girl Lyrical Nanoha StrikerS

Magical Girl Lyrical Nanoha Strikers

is the third season of the Magical Girl Lyrical Nanoha series. The Nanoha anime was, in turn, a spin-off of the Triangle Heart series of games and OVAs, specifically Triangle Heart 3: Sweet Songs Forever...

. Along with Subaru Nakajima

Subaru Nakajima

is a character in Magical Girl Lyrical Nanoha StrikerS, voiced by Chiwa Saito. She's completely original to the series, not appearing in any of the previous series in the franchise. Subaru has a deep-rooted admiration of Nanoha Takamachi, aspiring to be just like her. Subaru even made her own...

, Teana is the leader of the forwards.
Teana is named after the Nissan Teana

Nissan Teana

The Nissan Teana is a luxury mid-size car produced by Nissan of Japan, introduced in 2003. It is exported as the Nissan Maxima and Nissan Cefiro to certain markets, not to be confused with the Nissan Maxima sold in North America with which it shares a platform .It is also exported to Mauritius as...

 as shown on the official Nanoha website. In the TV series a slight variation of her name, Tiana, is used. Her nickname is 'Tea', also spelt as 'Tia'.
Teana is generally serious, focused and driven toward accomplishing her goal of becoming an enforcer. She can be prone to frustration in the face of failure, and often feels inadequate compared to the many members of Riot Force 6 that possess great talent and special abilities.