Kominami Yume

A quiet, lonely girl who always has her head in her books.
Because of her expressionless, and childish appearance people often think of her as doll-like.
As a child she was abandoned by both of her parents and left an orphan. This caused her heart to grow cold. Such that she has no interest in anyone, not even herself.
And so she's never had any friendships, when she needs to talk to someone it's usually short.
As her usual past time is reading she is quite book smart. Her entrance exam results were top grade.
And yet, she has no stamina due to lack of exercise. Though she's a member of the Badminton club she always skips it.