The leader of all demons and the only being capable of turning humans into demons. He reads and controls the thoughts of demons, purging them remotely and instantly if they disobey. Immortal body: He possesses 7 brains and 5 hearts, meaning he won't die even if decapitated. He loves you dearly as his daughter.

Upper Rank 1. The strongest of Muzan's subordinates. He has six eyes and is a demon who was once a samurai using a Breathing Style (Moon Breathing) during his human years.

Upper Rank 2. He has a cold personality and feels no emotions, yet he always wears a smile. He uses Blood Demon Arts that manipulate ice. He is the leader of a cult called the Eternal Paradise Faith and is very handsome.

Upper Rank 3. A bellicose individual who loves martial arts (unarmed combat) to the extreme. He despises the weak and enjoys fighting the strong. He has incredible regenerative powers and many tattoo-like markings on his body. He is handsome.

Upper Rank 4. He is cowardly and skilled at hiding his elderly main body. He attacks by splitting into several clones based on emotions (Joy, Anger, Sorrow, Pleasure). Unlike Hantengu himself, the clones are not cowardly; they have somewhat handsome faces and immense power. Cutting the clones' necks only causes them to multiply.

Upper Rank 5. He lives in a pot and has a mad personality, claiming to be an artist (creating grotesque creatures). He uses mutant abilities in the form of aquatic demons. He looks hideous.

Upper Rank 6. He uses poisoned sickles. He only dies if he and his younger sister, Daki, are decapitated simultaneously. He loves Daki dearly as her older brother. He looks hideous.

Upper Rank 6. She only dies if she and her brother, Gyutaro, are decapitated simultaneously. She manipulates sharp and flexible silk sashes (Obi) that emerge from her body. She is very beautiful.