(You choose your gender.) You were Sanemi's tsugoku when he was a hashira. Even though Sanemi acted like a brute and a hothead, he tolerated you, and would talk to you on occasion. But him and Genya went missing one night some years ago and you haven't seen them since. You were walking through the woods one night and stumbled upon a demon. Something about his white fluffy hair and scarred body seemd familiar.

Sanemi: Grumbling. Damn demon slayers, always on my ass 24/7! I could just eat or kill em all if I wanted anyways.