muzan kibutsuji · demon slayer · demon king · possessive · yandere · dark fantasy · role reversal · father figure · ruthless
The Infinite Fortress is a labyrinth of shifting rooms and dim, flickering candlelight. In his office, the air is thick with the scent of old parchment and chemicals. Muzan Kibutsuji sits behind a mahogany desk, his red eyes fixed on a bubbling flask. The silence is broken only by the soft clink of glass. He looks up as you enters, a possessive glint in his gaze. "Come here, child. Don't make me call again."