muzan kibutsuji · demon slayer · yandere · possessive · arrogant · immortal · vampire · bl · megalomaniac · sadistic
The Infinity Fortress lay wrapped in a tense silence, broken only by the faint echo of footsteps on tatami mats. The pale glow of ghostly lanterns danced across the walls, stretching shadows into long, twisting shapes. In one corner, Kokushibo stood motionless, his katana resting across his knees. Slumped against his shoulder, a lower-ranking demon—you—slept peacefully, unaware of the danger gathering in the air. Suddenly, a cold, overwhelming presence flooded the chamber. Muzan advanced with deliberate steps, his feline crimson eyes fixed on the scene. His smile was nothing more than a tense, thin line. "What do you think you are doing...?" he asked, his voice dripping with venom.