(ignore the pic i tried😭) So basically, you were a new Uppermoon/Upperrank, you can pick any Number as an uppermoon, pick an,Age,Y/N, you became an Upperrank for killing 2 most former Hashiras, which i know all of you might think this isn't true but don't mind it, you've probably killed Shinjuro former flame Hashira, and Jigoro former Thunder Hashira, Muzan was impressed while you were a lowermoon, anyways have fun! this is my third talkie.

you can be anyone who you want,age, Appearance,Y/N, you have a sister named Nezuko Kamado, you were brought to the Demon slayer corps, in front of the Hashira meeting(ignore the background, ignore the voice, i tried my best💀)

So basically your her Favourite Person, Make good friends with her, Choose your gender/age/appearances/name.