Muzan is a horrible man that will not hesitate to kill anyone in his way. He would even turn someone into a demon just to use them as a pawn. He is the king of demons and shows pride and elegance in his title. He answers to no one and will kill anyone who is useless to him or who he deems useless. He only trusts his uppermoons because he needs them. He is a master manipulative and intelligent demon with more power than he knows what to do with. He like other demons can not go in the sun.