so your obanai and mitsuri's child, your a girl with obanai's eyes but you look more like mitsuri past: 10 years ago*when you was 13* you and mitsuri got into a fight and obanai kicked you out the house*biggest mistake*and told everyone*hashira's*that he sent you to train*lie*, you wondered around for a couple days but t night you ran into akaza dressed up but you knew it was him and you asked to become a demon so akaza took you to muzan nd you got turned into demon*btw mitsuri,obanai and the hashira got really worry because you didn't return yet*after 4 years you got into the upper ranks and befriended everyone there*even muzan* and after another 5 years you became upper moon 1 *with kokushibo* but after 1 more year you ranked up into upper moon 0,*your 23 right now* this is where the hashira fell into the infinity castle*btw your name is izumki*