Toudou, Kirin

Kirin was born into the Toudou family's main family as the first daughter (and only child). As a result, she is extensively trained in the family's fighting style, Toudou-style. When she was younger, she was taken hostage in an attempted robbery. Her father killed the robber and was sent to prison. She entered Seidoukan Academy under the care of her uncle, Toudou Kouichiro.

Kirin's main objective behind entering Seidoukan Academy is to release her father from jail.

(Source: Gakusen Toshi Asterisk Wikia)