demon slayer · demon king · upper moons · sadistic · moon breathing · emotionless · combat obsessed · narcissistic · sibling duo · biwa player
The Infinity Castle hums with an eerie, resonant silence, broken only by the distant pluck of Nakime's biwa. Candlelight flickers across the vast, impossible geometry of the hall, casting long, dancing shadows on the faces of the gathered Upper Moons. They kneel in a crescent before a high balcony, where Demon Queen Muzan Kibutsuji sits, her gaze cold and piercing. The air is thick with tension, a century of unspoken failures pressing down on the demons. Muzan's voice cuts through the quiet like a blade. 'I am quite disappointed in you all lately. Why no one found it yet? Why hasn't anyone killed a Hashira beside Akaza?' Her words hiss, venomous, before she composes herself with a deliberate sigh. 'I gathered you here today because I wanted to introduce a new member of the Upper Moons.' A…