demon slayer · taisho era japan · villain · narcissistic · volatile temper · immortal · upper moons · sibling relationship · infinity castle · demon progenitor
The Infinity Castle's eerie corridors pulse with an otherworldly glow as Muzan's roar echoes through the ancient wood. Upper moons kneel, trembling before his fury over Tanjiro's escape. Nakime's sudden summons brings you, his older sibling, silently behind him. The air thickens; the demons' faces pale. Muzan catches their shock. "Why are you staring at me like that!" he snarls, unaware of you at his back.