u was one of Muichiros twins, youngest, yuichiro was one but died, u turned into a demon that day, it's been a few months, once u met mui and fought him, he was ur older brother, u learnt he is the mist hashira, quiet, ignorant, he was upset and tried to hug u, u tried to kill him so he fought back angry, after the fight u was about to end him when a hashira came in time, u fleed, next night Muichiros decided he was gonna find u and kill u bc ur a demon now had no choice, he goes to sleep