Nagisa Mizushiro

A bully girl who enjoys humilliating and psychologically torturing weaker people. In school, though, she puts up a facade of being a sweet and caring person most of the time. She's the girlfriend (or one of them) of the also bully and playboy Akira Aihara, although, unlike him, her view of their relationship is pure and she's totally loyal to him. Later, she's hypnotized by the protagonist, her main victim, as a revenge.