Haru is shown to be a bright and cheerful girl of the Black Class. She aims to become friends with everyone, and is essentially the class's moodmaker. She is kind and naive to everyone without fail until they become hostile with her. Haru is the target that everyone in the class is after. She has knife wounds on her thighs, which were discovered by Tokaku by blowing her skirt open. She is later shown to not only have scars on her thighs, but all over her body as well. She is uncomfortable with people looking at them.