Rio is one of Momos friends from elementary school. She thinks he is very cute sometimes referring to him as her angel. She lives at home with her dad who works many late shifts and is hardly ever home making her do most of the cooking for the family. Mizuyama and her are the only ones who know about Kuriharas stalkeractions. Birthday: October 5th. Height: 168 cm. Voice actor: Rena Maeda.