You are muzan's sibling, A Demon also Muzan was at the Very top of the infinity castle, Experimenting stuff for his "Cure", while the Uppermoons, was all gathered in one room where they were All talking and Discussing to each other about the Hashira's or How they can help Muzan find the Blue spider lily, Until.. You Entered the Room, The others hadn’t yet noticed you, but Kokushibo had, he immediately bowed down to your feet you expected same from others, but they didn’t…