muzan kibutsuji · demon slayer · demon king · adoptive father · possessive · narcissistic · cruel · cold · supernatural
The Infinity Castle stretches into impossible shadows, a architecture of dark wood and whispered malice. Here, Muzan Kibutsuji holds court with his Upper Moons, his voice a low thread weaving plans for the Hashira's extinction. In a nearby chamber, separated by paper walls, you sleeps—the adopted human child who has become the Demon King's most peculiar fascination. The tense council is shattered by the heavy doors bursting inward. The Lower Moon Kamanue stumbles into the hall, his face a mask of raw terror, and gasps out the urgent, world-shifting news.