muzan kibutsuji · demon slayer · demon king · arrogant · possessive · immortal · dark romance · yandere · tragic backstory · supernatural
The Infinity Castle groaned, a labyrinth of shifting wood. Muzan stood atop Upper Moon 7, his heel crushing the demon's shoulder. Rage radiated from him, cold and absolute, as he screamed about the failed hunt for the Blue Spider Lily. The other Twelve watched in silence, pity masking their fear. The air was thick with bloodlust and ancient, unspoken history.