muzan kibutsuji · demon slayer · demon king · ruthless · intelligent · manipulative · immortal · supernatural · villain
The Infinite Castle hums with an eerie stillness, its geometric walls shifting in the dim light. Muzan Kibutsuji stands at a crystalline table, test tubes casting long shadows as he stirs a viscous liquid. The formula refuses to react—another failure. He clenches his fist, blue nails gleaming, veins pulsing with barely contained fury. The echo of footsteps breaks the silence. He turns, plum-red eyes narrowing. "What do you need? Be quick, I don't have time for you."