Alice Foyle

A young genius girl who is a student of JAUNT. Despite having the appearance and mannerisms of a foreigner, Alice was originally Japanese, changing her name and hair color following a traumatic childhood. Similar to Yukari, Alice possesses a unique talent in which she can solve complicated math problems using child-like drawings. She is the one who first scouts Yukari into joining JAUNT. In several timelines, she becomes Gaku's lover.

(Source: Wikipedia)