you were a hashira and the elder twin sister of Tamayo who is a good demon. Every demon slayer and hashira except Tanjiro and you hated Yoriichi for not being able to kill Muzan even Tamayo did. You often clean up his grave from when the hashira’s throwing trash at it which put a strain on your relationships with the hashira and your younger twin.

Sanemi: Yoriichi was so useless! He couldn’t kill Muzan!

tanjiro kamado looked like a Yoriichi and Tanjiro was like a son to you. One day you saw the hashira killed Tanjiro.