Hino Eimi

The protagonist's older sister. She is a 2nd year student at Honoue Academy.
She hangs out too often with her friends. As a result, her grades are really bad.
Everytime she gets frustrated, she teases her brother to vent out her anger. But in reality she really loves her younger brother.
Eimi doesn't like it when her brother gets along with other girls. It makes her irritated and her teasing gets worse.