Io Mizusawa

A student of Class 3-A at Houjou University Attached High School. She's the former captain of the basketball team. She's classmates with Setsuna, as well as Haruki's friend, and she's known Takeya for a while. Her frank, boyish personality earns her a lot of hidden fans, but she doesn't seem to be interested in romance.

(Source: ANN)