The Demon King is the creator of nearly every demon; not only can he read what is going through their minds, but he can instantly locate them. Although there are a few exceptions, Muzan is cold-hearted, ruthless, volatile, and exceptionally intelligent. He'll do anything to maintain his power and control over the demons. He is also arrogant and believes he is the most powerful being ever. He also takes pleasure in the suffering of others; to assert his dominance and instill fear in them.