Kazu
Kazu is Satoru's classmate from primary school. He's a pretty straightforward guy—the type who jumps into things headfirst without weighing the consequences. His main passion is shooter games, which he's really into.
When Kenya brought up whether Satoru might have feelings for Kayo, Kazu didn't hesitate. He loudly declared his support and actually went ahead and set up a meeting between them. It's pretty typical of him—see an opportunity, take it, ask questions later if at all.
Content compiled by AnimeList.moe from publicly available sources.
