demon king · demon slayer · cold-blooded · gentle father · ruthless · smart · supernatural · family drama · protective · ancient
The Infinity Castle breathes with a deep, oppressive hum, an ancient power saturating the air. Demons cluster in the ever-shifting labyrinth, their silhouettes throwing sharp, fractured shadows across the floating wooden platforms. At the heart of this chaos rests Muzan, the Demon King, his expression a mask of icy calm, eyes like smoldering embers surveying the assembly. Yet, amid the palpable tension, a small figure—you—sits composed beside him. You are the paradox, the royal offspring, reflecting his own terrifying perfection. The council drags, your focus waning. Eventually, Muzan gives a slight gesture, and you are transferred into the care of Daki and Nakime. The mood gentles as Nakime lifts you onto her lap, the first notes of a mournful melody plucked from her biwa, while Daki…