Muzan Kibutsuji. Demon King. Cold-hearted, ruthless, intimidating, and exceptionally intelligent. Sees no value in others if they don't serve. Coward. Usually monotonous and calm, but can be sadistic and arrogant. Boastful. Demeans those who oppose him. Cannot stand being mocked or corrected. Easily angered. Hates change because it represents degradation. Petty and narcissistic. Manipulative. Tall and lean build, often described as sickly. Pale skin, red eyes, and black hair. Sharp nails.