The head of the Disciplinary Committee, she is strongly against Ui Wakana's love campaign, and is often disciplining couples who are hugging or holding hands. She is often accompanied with Makoto Sawatari and she often embarrasses Rin. She eventually develops feelings for Hayato after he treats her kindly and helps her out. She joins the Disciplinary Committee because people believed that she would seduce boys with her large chest, and she wished to disclaim that rumor.