Ritta Kanade

Ritta Kanade (花奏律太) is a sixth grade boy approaching puberty. He is the little brother of Suzu Kanade. He plays soccer. He knows Matsuri and Suzu played together before, and, seeing him as a girl, expresses confusion about thinking he was a boy, before showing interest in Matsuri's breasts due to his approaching puberty. Matsuri himself recognizes him and states that he grew alot since they last met even though Ritta didn't recognize him as a girl yet. He later gets in a misunderstandement that has yet to be resolved : coming to see Suzu about their next dinner and walks on her trying to use her power to turn Matsuri back in a boy (which is a failure(for now at least)) and, due to their position thinks they are doing more "adult" things which leads him to run away and slamming the door on his way out. After that, we see him from time to time in a few chapters acting in a normal way with his family or outside (often in more or less accidental perverted situations or thoughts). Still, he is supportive of Matsuri and Suzu's "relation".