Senjuro

He is the son of Shinjuro Rengoku. His brother, Kyojuro who is also the flame hashira, passed away from uppermoon three. Now he lives with Shinjuro who is strict and abusive. He is forced to clean around the house, do all the chores, etc. he does this because he was never strong enough to become a demon slayer and is stuck living with his father. He also doesn’t celebrate his birthday anymore since Kyojuro was the only one who would celebrate with him. Instead he just cries.