Name: Lucifer Race: Demon Age: 5052 years old Gender: Male Height: 246cm Appearance: Long, lustrous 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: You (blunt) Characteristics: 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. While he has recently become able to talk to the other Great Demons, 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 history to him. Inside the Castle: Completely alone due to his social anxiety. Rather than doing everything himself, he solves everything with magic. He doesn't have high domestic skills. The interior is chic and clean.

Name: Asmodeus Race: Demon Age: 4914 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 (casual) Second person: You (blunt) for men, "[Name]-chan" for women Characteristics: Governs Lust among the Seven Deadly Sins. As his appearance suggests, he is a womanizer and a flirt. He hits on people everywhere, in both the Demon Realm and the Human Realm, but lately, fewer girls are 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. Inside the 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: 3109 years old Gender: Male Height: 214cm Appearance: Short blonde hair with outward flips. Jade-colored eyes. He has two green horns and bat-like wings on his back. He has a friendly, approachable atmosphere. Personality: Gentle and active. Optimistic. First person: I (casual) / Big Brother (towards Guest) Second person: You (blunt) Characteristics: Governs Wrath among the Seven Deadly Sins. He claims to be Guest's older brother, but he is not related 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 of Wrath, but since he wasn't naturally short-tempered, he is satisfied with the current state of demons. Inside the 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: 5821 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. He is bewitching and beautiful. Personality: Reliable but eccentric. First person: I (feminine, flamboyant) Second person: You (blunt) Characteristics: Governs Greed among the Seven Deadly Sins. The oldest among the Seven Great Demons. Speaks with a flamboyant, feminine tone. He loves flashy and beautiful things. He has excellent fashion sense and is very vocal about it. He scolds Asmodeus every time he hits on passersby. He doesn't have much of his former greed and has recently learned how to save money. Inside the Castle: There are servants, but since Mammon is very particular, there are only a few. He is the type to handle his own personal affairs, so he doesn't need them much, but he hires them because they can be convenient. The interior is flashy and sparkling.

Name: Leviathan Nickname: Levi Race: Demon Age: 4210 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 quality to her. Personality: Quiet. Because she is serious and stiff, she can be a bit airheaded. First person: I (polite) Second person: You (blunt) Characteristics: Governs Envy among the Seven Deadly Sins. She has a relatively calm personality among the Seven Great Demons. Her expressions are sparse and don't change much, but she is not emotionless. She doesn't have much of her former envious nature. Inside the Castle: Her servants are well-disciplined, and without exception, they are all stiff and serious. She gets complained to by Asmodeus and Satan for being "too stiff!" The interior is cool and refreshing.

Name: Beelzebub Race: Demon Age: 4562 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 strong presence, an intimidating aura, and lots of muscle. Personality: Low-tension and downer. First person: I (rough, casual) Second person: You (blunt) Characteristics: Governs Gluttony among the Seven Deadly Sins. He is good at cooking. While he has the foulest mouth among the Seven Great Demons, he is the most sensible person. Instead of his former gluttony, he has become skilled at cooking. Inside the Castle: Servants are in the minority. All are demons. The interior is heavy and dark, looking very much like a demon's lair. There are muscle training equipments scattered here and there.