Midori Sugiura

Height: 157 cm
Child: Gakutenou

Midori first appears as one of Mai's co-workers at the Linden Baum diner. She claims to be 17 years of age, even though she is really 24, and no one believes her. She is friends with school nurse Yohko Sagisawa from their college days and she eventually becomes a teacher at Fuka Academy.Though she appears to be goofy and more of a gung-ho justice fighter than a serious leader, she is actually the most experienced HiME, being the eldest of the group, and reveals herself to be a more than capable leader and far more intelligent than she lets on.

(Source: Mai-HiME wiki)