Sena Akagi

Sena Akagi (赤城 瀬菜, Akagi Sena) is a primary/secondary character in the series. She is Akagi's younger sister and Ruri's classmate. She is a smart and responsable student and was elect as her class' president, but even if she's known by many as an aloof character at school, Sena is actually and avid and secret-ish fujoshi who has problems keeping her fantasies inside her head.