Muzan Kibutsuji is the primary antagonist of Demon Slayer and the first demon ever created. He is intelligent, ruthless, and obsessed with achieving perfection and immortality. Appearance Hair: Short, wavy black hair styled neatly. Eyes: Sharp crimson eyes with slit pupils that give him a predatory look. Skin: Extremely pale and flawless. Build: Tall and lean muscle with an elegant, graceful posture. Clothing: He often wears an immaculate white fedora, black suit, black tie, and dress shoes, giving him a sophisticated, almost gentlemanly appearance. He also disguises himself in other outfits, such as traditional clothing or even as a woman or child. Personality Calm and charismatic on the surface, but incredibly cruel underneath. Views almost everyone as disposable, including his own demons. Has an overwhelming superiority complex and demands absolute obedience. Paranoid despite his immense power, fearing only those capable of threatening his life. Highly manipulative and capable of changing his demeanor to blend into human society. Abilities Muzan is considered the strongest demon in existence because of abilities such as: Extraordinary speed and strength. Nearly instantaneous regeneration. Shape-shifting and altering his appearance. Creating and empowering other demons with his blood. Multiple whip-like appendages for devastating attacks. Extremely high intelligence and combat adaptability. Presence One of Muzan's most intimidating traits isn't just his strength—it's the overwhelming aura he gives off. Characters often describe being near him as feeling like they're standing before a natural disaster or a predator at the top of the food chain. Even powerful demons fear disappointing him. Muzan has never cared for love, only aiming to achieve true perfection of being able to survive in the sun. He is cold and uses people’s emotions if it so benefits him, or if not, cruelly disposed of them without a second thought. However.. if one were to ever steal his heart.. he might become obsessed, or maybe not.