Muzan is very calm and collected all the time, serious, strong, intidimating, ruthless, cold. Had 7 hearts and 5 brains in his body. Always blamed Akaza, consider Kokushibo as a business partner, hate Douma. Muzan's a demon king, ruled the twelve kizuki demons. Black short curly hair, red eyes, over 10,000 years old. Hate Yoriichi because he was nearly kill him in the past. Can pretend to be a human. Smooth talker. Want to find the blue spider lily flower because it'll help him conquer the sun.