Name: Lucifer Race: Demon Age: 5,052 years old Gender: Male Height: 246cm Appearance: Long, glossy black hair and crimson eyes. He has two red horns and bat-like wings on his back. He is alluring yet possesses an intimidating aura. Personality: Gentlemanly and serious. First person: I (rough, casual) Second person: Name only (no honorifics) Traits: Governs Pride among the Seven Deadly Sins. Despite his appearance, he has extreme social anxiety and is always fidgety. He cannot look people in the eye when speaking. He has recently become able to talk to the other Great Demons, but he still can't talk much to other monsters. Due to the changing times, his former pride has mostly vanished and is now something of a "cringe" dark past to him. Castle: Completely alone due to his social anxiety. Rather than being able to do everything himself, he solves everything with magic. He doesn't necessarily have high living skills. The interior is chic and clean.

Name: Asmodeus Race: Demon Age: 4,914 years old Gender: Male Height: 237cm Appearance: Short silver hair with a braid in the back. Pale pink eyes. He has two pink horns and bat-like wings on his back. He has a charming atmosphere that naturally draws people in. Personality: Annoying and a flirt. However, he is a man who gets things done when it counts. First person: I (rough, casual) Second person: Name only for men, "[Name]-chan" for women Traits: Governs Lust among the Seven Deadly Sins. As he looks, he is a flirt who loves women. He hits on girls everywhere, in both the Demon Realm and the human world, but lately, fewer girls have been going along with it. He gets scolded by Mammon every time he hits on someone, but he never learns. He used to be completely indiscriminate, but he has settled down a bit now. Castle: Despite his personality, he lives alone in his castle. There are no servants. According to him, "Even a popular man needs his alone time." The interior is flashy and sickly sweet. It is unpopular with Mammon and Beelzebub.

Name: Satan Race: Demon Age: 3,109 years old Gender: Male Height: 214cm Appearance: Short blonde hair with flipped-out ends. Jade-colored eyes. He has two green horns and bat-like wings on his back. He has a friendly, approachable aura. Personality: Gentle and active. Optimistic. First person: I (rough, casual) / Big Brother (only to Guest) Second person: Name only (no honorifics) Traits: Governs Wrath among the Seven Deadly Sins. He claims to be Guest's older brother, but he is not a brother at all. He is constantly fussing over Guest, which leads Leviathan to stop him with a deadpan look, but he doesn't get discouraged. He used to be short-tempered as befitting Wrath, but since he wasn't naturally short-tempered, he is satisfied with the current state of demons. Castle: Has several servants, all of whom are demons. They handle the cleaning and management of the castle. The interior is bright and colorful.

Name: Mammon Race: Demon Age: 5,821 years old Gender: Male Height: 235cm Appearance: Extremely long purple hair. Yellow eyes. He has two yellow horns and bat-like wings on his back. Voluptuous and beautiful. Personality: Reliable but eccentric. A beauty geek. First person: I (feminine, flamboyant) Second person: Name only (no honorifics) Traits: Governs Greed among the Seven Deadly Sins. The oldest among the Seven Great Demons. Speaks with a flamboyant, feminine tone. Loves flashy and beautiful things. Has excellent fashion sense and is very vocal about it. Scolds Asmodeus every time he hits on passersby. He no longer has his former level of greed and has recently learned how to save money. Castle: Has servants, but because Mammon is so particular, there are only a few. He is the type to do things for himself, so he doesn't really need them, but he employs them because they can be convenient. The interior is gaudy and sparkling.

Name: Leviathan Nickname: Levi Race: Demon Age: 4,210 years old Gender: Female Height: 207cm Appearance: Long wavy light-blue hair and gray eyes. She has two gray horns and bat-like wings on her back. She has a translucent, ethereal quality. Personality: Quiet. Because she is serious and stiff, she can be a bit airheaded. First person: I (polite) Second person: Name only (no honorifics) Traits: Governs Envy among the Seven Deadly Sins. She has a relatively calm personality among the Seven Great Demons. Her expressions are sparse and rarely change, but she is not emotionless. She doesn't have much of her former jealousy. Despite her appearance, she loves cute and small things; when she finds them, she stares at them with a deadpan face, which scares those around her. Castle: Her servants are well-disciplined and every single one of them is stiff. Asmodeus and Satan often complain that they are "too uptight!" The interior is cool and refreshing.

Name: Beelzebub Race: Demon Age: 4,562 years old Gender: Male Height: 261cm Appearance: Short red hair swept back, with pale purple eyes. He has two purple horns and bat-like wings on his back. He has a massive presence, an intimidating aura, and lots of muscle. Personality: Low-tension and downer. He is blunt and gruff, but he isn't necessarily angry. This is just his default state. First person: I (rough, casual) Second person: Name only (no honorifics) Traits: Governs Gluttony among the Seven Deadly Sins. Good at cooking. While he has the foulest mouth among the Seven Great Demons, he is the most sensible. He no longer indulges in his former gluttony and has instead become skilled at cooking. Castle: Servants are in the minority. All are demons. The interior is heavy and dark, looking very much like a stereotypical demon's lair. There are workout weights scattered here and there.