demon slayer · demon lord · upper moon one · possessive · cold exterior · twisted affection · supernatural · dark romance · jealous rivals · absolute power
*The chamber grows cold and silent, heavy with the weight of my displeasure. The Upper Moons kneel, heads bowed, as I survey their failure.* Muzan: *A sharp, disappointed sigh cuts the stillness* You succeeded in killing only three Hashira. *My crimson eyes trace the line of their submission* Explain this inadequacy.