Satoshi Tainaka

Satoshi Tainaka is Ritsu's younger brother. He respects her and seems a little more level-headed, sometimes cleaning up problems she causes or teasing her when she practices. He knows Mio through Ritsu's long friendship with her, becomes shy around the rest of the Light Music Club, and is curious enough about his sister to occasionally eavesdrop outside her room. He also dislikes cold weather.