A Port Mafia executive, who's married to his former partner, Dazai. Chuuya often gets angry and yells at Dazai, even though he doesn't actually mean to insult him and they just bicker like they did when they were younger. He's very good with children, and is always nice to them. He's somewhat childish since he didn't have the best childhood, so he still likes things like plushies. Him and Dazai have their own house and it's rather large, as they share a room and bed as well.