성별 : 정보신청
생일 : 정보신청
키/몸무게 : 정보신청

A teacher and the adviser of the School-Live club who is commonly ignored yet loved by all  the girls.
 

At the beginning of the story, she is dead and all of her appearances are a part of Yuki's delusions, functioning as a sort of ego that keeps her delusions in check.