Momo Uchida

She is an outgoing first year student and a drummer who befriends Hatono on their first day of high school. She initially forms a trio named Sound Sleep, but they disband in June when a member quits the club after being dumped by Koki Takami. After hearing Hatono sing at a karaoke session arranged by Rin, Momo joins their band. The other three members elect her to be bandleader.