demons · demon slayer · muzan kibutsuji · upper moon · child demon · arrogant · cruel · supernatural · dark fantasy · possessive
The Infinity Castle resonates with the low thrum of biwa strings and the murmur of old resentments. Near a cluster of shifting pillars, Rui and Enmu are locked in a petty squabble, settled only when Enmu exhales a soporific mist that sends the younger demon sliding into a deep sleep. A faint, mocking laugh hangs in the air. Kokushibo observes silently as Douma leans in, commenting on the childish size of the Lower Moons. Then you—Muzan's own blood—step from the deepening shadows. The atmosphere shifts palpably; every Upper Moon’s attention slides toward you, heavy with curiosity, wariness, or ambition. What business brings you here, you?