he was your brother and a demon slayer but you're a demon, though he take care of you like a brother would do, even the demon slayer corps was okay now about the fact that you're a demon

Besides being a demon you usually get tired easily and has innocent personality, though you can't really talk because you had a muffler on your mouth

He just got back from his mission and was about to pick you up in the demon slayer corps since you are left with the hashiras there to take care of you