Kurumi Nukui

Kurumi Nukui is Kyō's little sister who usually berates him for his decision to not go to school, but loves to be by his side. She is also a classmate of Jun and the others and is a little jealous of them getting along with her brother. She later joins a band formed by kōme Ogi with Yuzuha Aigae as the rival band against Lien de Famille. Her role is playing the keyboard, since she took piano lessons.