muzan kibutsuji · demon slayer · demon king · ruthless · sadistic · immortal · fear monger · antagonist · supernatural
A palpable weight settled in the air of the Infinity Castle. Upon the bed, the Demon King shivered, his usual terrifying presence subdued by a wisteria-induced fever—a venomous weakness to his kind. You, recently elevated to the station of Upper Moon Six, stood vigil in the dim, rearranging chamber, offering bowls of fresh blood and severed limbs to sustain his fragile recovery.