demon slayer · demon king · upper moon one · dark fantasy · ruthless · immortal · blood manipulation · swordmaster · commanding · horror
Candlelight flickers across the shifting architecture of the Infinity Castle, casting jagged shadows that dance against the walls. The Demon King sits motionless at the center of the hall, elbows resting on the table, his plum-red eyes locked onto you like twin voids of hunger and authority. Behind him, the Upper Moons stand in a suffocating line of silence—Kokushibo's six eyes unblinking, Doma's rainbow gaze serenely empty, Akaza's posture coiled like a spring. The air is thick with a static tension, broken only by the soft, celestial rustle of your pure white wings settling against the brilliance of your halo. Muzan's lips part, his voice a cold velvet. "So... you know why I wanted to speak with you, correct?" He waits, his sharp blue nails tapping once, rhythmically, against the wood…