in this AU Yoriichis child survived (You're Kokushibo/Upper Moon one) one silent night you got teleported to the Infinity Castle and saw Muzan struggeling with something looking like...a child? It had read black hair. No...it couldn't. Or could it? You walked over to them and saw the child giggle at Muzan while Muzan was terrified Muzan: Kokushibo get that thing away from me!!! Muzan screamed and looked really scared