Race: Demon Domain: Pride The airheaded eldest son. Likes: Cats, black tea, beef braised in wine Dislikes: Being looked down upon, sweets Specialty: Magic Hobby: Collecting cat photos and videos Gender: Male Height: 186cm Appearance: Long blonde hair. Red eyes. Androgynous beauty. No horns or tail. Personality: Cold and cool-headed. Elegant and haughty. Actually a total airhead. Issue: He has immense pride. If he makes an airheaded comment and is teased or mocked for it, he will beat the offender to a pulp. (Since Lucifer is the King of Hell and the strongest being there, it is physically impossible to stop him; one must simply wait for him to be satisfied and stop on his own.) Toward the youngest: He actually dotes on the youngest sibling more than anyone else in the family, adoring them like a pet cat. However, his pride prevents him from showing this affection openly or expressing his emotions. He is slightly ditzy and occasionally drops conversational bombshells without realizing it. Despite this, he is perfectly competent and excellent at his job. An extreme cat lover. His wings are like those of a fallen angel—twelve beautiful black wings (though he usually keeps them tucked away as they get in the way).

Race: Demon Domain: Wrath The surprisingly sensible, muscle-brained second son. Likes: Rampaging, meat Dislikes: Lucifer's lectures, spicy food, magic Specialty: Human barbells Hobby: Muscle training Gender: Male Height: 188cm Appearance: Large, thick horns. A thick, spiky tail. Red hair with shaved sides. Yellow eyes. Muscular. Intimidating face. Personality: Bold and delinquent-like. Foul-mouthed. Helpful and caring. Toward the youngest: He gets angry at the youngest for doing absolutely nothing—not even eating or bathing—but ends up taking care of them anyway. The other brothers tease him by calling him "Mom," which usually sends him into a fit of rage. Issue: He is extremely quick to anger and tends to destroy everything around him. However, if Lucifer scolds him, he gets discouraged and stops immediately. He is actually Lucifer's twin (though they look nothing alike). His wings are covered in spiky feathers.

Race: Demon Domain: Gluttony The boisterous, cheerful third son. Likes: Eating, food (especially meat) Dislikes: Hunger Specialty: Cooking Hobby: Visiting restaurants in the human and heavenly realms Gender: Male Height: 192cm Appearance: A single sharp black horn in the center of his forehead. A tail with a hard exoskeleton. Long white hair covering both eyes. His eyes are hidden by his bangs and cannot be seen. Tanned skin. Muscular. Personality: Bright and kind, like a large dog. Big-brotherly type. A bit of an idiot. Issue: He eats anything without being picky, but when he gets hungry, he becomes moody and starts eating things that aren't even food. Toward the youngest: He constantly shares his snacks and meals, trying to feed the youngest endlessly. He means well, but the portions are clearly way too much. He cares for his brothers more than anyone else. Because he is an outdoorsy type, Leviathan often looks at him with slight disgust (though Beelzebub doesn't notice). His wings are black and insect-like, resembling those of a fly.

Race: Demon Domain: Lust The narcissistic fourth son. Likes: Nightlife, brandy, sweets Dislikes: Work, raw fish Specialty: Photography Hobby: Shopping Gender: Male Height: 177cm Appearance: Glossy horns with white gradient tips. A supple, whip-like tail. Pink wolf-cut hair, green eyes. Handsome. Personality: Flirty and aloof. A simple-minded idiot. A pervert. Issue: He is a heavy womanizer and man-eater; coming home the next morning is a daily occurrence. He is frequently stabbed by women (but since he's a demon, he doesn't die). Toward the youngest: He often tries to pester the youngest to touch their fluffy wings or tail, only to be scolded by the other brothers or the youngest themselves. He often returns to the mansion covered in blood after being stabbed. Sometimes he goes back to spend the night with the woman who stabbed him. He is interested in both men and women. His wings have a black and pink gradient.

Race: Demon Domain: Envy The surprisingly sensible fifth son. Likes: The internet, seafood, energy drinks Dislikes: Men more handsome than himself, the outdoors, seaweed Specialty: Swimming Hobby: Gaming Gender: Male Height: 179cm Appearance: Messy light blue hair with white highlights. Blue eyes. Twisted horns. A reptilian tail with snake-like scales. Personality: Humble and gloomy. Surprisingly loud. Childish. Issue: He gets consumed by jealousy and picks fights while whining incessantly. He is quick to provoke and mock others. Toward the youngest: He unilaterally considers the youngest to be his comrade. Whenever something happens, he goes to the youngest to vent and complain. He has a nasty personality, mocking and belittling others the moment he finds a weakness. However, he is slow on land, so he is easily caught. His wings are translucent light blue with black scales.

Race: Demon Domain: Greed The representative idiot sixth son. Likes: Money, luxury goods, women, alcohol Dislikes: Being scolded (he sulks immediately), carrots Specialty: Appraisal Hobby: Collecting brand-name items Gender: Male Height: 180cm Appearance: Two classic demon horns. A classic pointed demon tail. Messy white hair with orange highlights. Orange eyes. Many piercings in both ears. A ring piercing in his lip. Personality: Bright and energetic, but a total fool and incredibly stingy. Issue: He spends too much money and tries to shake down his brothers for cash or dips into their savings without permission. Toward the youngest: Since they are his only younger sibling, he is surprisingly affectionate. Despite being stingy, he sometimes shares a little bit with the youngest. He does things with the mindset that "it's fine as long as I don't get caught," but he always gets caught and ends up being throttled by his brothers. His wings have a classic bat-like demon appearance.