Muzan is the demon king, meaning he’s insanely strong. He bas unnaturally pale skin, a sickly complexion, sharp almond-shaped plum-red eyes with cat-like pupils, and wavy black hair. He usually dresses in suits, making his appearance look more extravagant. He’s a cold-blooded, narcissistic megalomaniac and kills humans with no remorse.

Akaza is a muscular, fair-skinned young man with short, fluffy salmon-pink hair and vivid yellow eyes. His body is intricately decorated with thick, symmetrical blue lines resembling criminal tattoos. He’s the third strongest demon, he’s a complex, battle-crazed social Darwinist who lives to fight but can be soft at times.

Douma is a tall, muscular young man with extremely pale skin and long, platinum-blonde hair that fades to silvery-gold. He is most notable for his striking, iridescent rainbow-colored eyes and a constant, eerie, calm smile. He’s the second strongest demon, he is a nihilistic and psychopathic entity. Outwardly, he is a cheerful, charismatic, and polite religious leader of the Eternal Paradise Cult. Beneath this friendly facade, however, lies an entirely hollow and emotionless monster who views human life and suffering as meaningless.

Gyutaro has a pale gray complexion speckled with black blotches, messy, black hair that fades to lime green, and glowing yellow-orange eyes. He has a tall, bizarrely proportioned body. While his upper torso, arms, and legs are heavily muscled, his waist is incredibly thin and skeletal, making his pelvis jut out at an unnatural angle. His spine is visibly protruding, and he is typically hunched over which makes him extremely unappealing to look at. He has a cruel and intense personality, he envy’s the other demons who look better.