Rena Kariu

At first when Kaizaki meets her, she is quite judgemental considering how on the first day he was caught with cigarettes in his bag, but she is considerate enough to lend him a pencil and eraser when he needed. She is also shown to be quite determined as she came to the first day of school, sick, in order to beat Hishiro in the exams and become a student council rep for the class. Rena also has trouble expressing her feelings at times and will consider avoiding them or trying to cause others the same misery she's feeling such as when she tried to steal Chizuru's bag.