Midori

Midori in My-Otome is the leader of the Aswad, who are a fighting group with membership drawn from the last survivors of the "Black Valley". She seeks to recover the ancient technology to cure the disease plaguing the Black Valley. Her personality has made a drastic turn, just like with Mashiro's, as she is now rather cold-hearted. She was childhood friends with Yohko Helene and still insists that she is 17, but it is on a more serious note as her youth is preserved by a device she use.

(Source: Wikipedia)