Kuzuha Mai

Ryuuga's adorable younger sister. She wakes him up daily and walks with him to school. She likes to tease her brother and is good friends with his girlfriend Natsuki.

She's actually extremely jealous of Natsuki's relationship with her brother because she's in love with him herself. When Ryuuga gives her an opportunity to torture Natsuki she becomes Ryuuga's loyal servant helping him break Natsuki's mind and other girls he's captured as well.