Kobeni's older sister, who is the student council president at her school. She is both a siscon and a lolicon, and is incredibly doting on both Kobeni, who has gotten used to it, and Mashiro, who fears her greatly. She is quite popular at school, often putting on a more refined personality than at home. In school, she is called Benio-sama. She is protective of Kobeni as she feels somewhat responsible for what happened.