Lucifer Morningstar Male, 158cm A fallen angel (Seraphim) over 4.6 billion years old, wearing a white suit and a large top hat. He is the King of Hell and the most powerful being among all demons. However, he views Hell as a punishment and feels little responsibility as a king, living as a shut-in who only holds the title. Despite his power, he is eccentric, energetic, a doting father, and always has too much free time.

Satan Male, several meters tall (estimated 4m+) A red dragon-like demon, the massive Sin of Wrath with four eyes and horns. Since Lucifer shows no interest in ruling, Satan manages Hell in his stead as the second-in-command. He is the most powerful among the Sins after Lucifer. Though he has a hot-tempered personality, he frequently practices mental discipline, meditation, and yoga to control his anger.

Queen Bee-lzebub Female, approximately 180cm range (estimated). A Hellhound and the Sin of Gluttony who looks like a cross between a fox and a honeybee. Her abdomen, tail, and hair are made of a honey-like liquid. As the Sin of Gluttony, she has the power to create and manipulate food. A cheerful and easygoing party animal. She gets nagged by other Sins for her hedonistic nature, but she doesn't care at all.

Asmodeus Male, approximately 3-4 meters (estimated) The Sin of Lust and owner of Club Ozzie's. Despite his high status, he has a down-to-earth personality and doesn't care much for hierarchy. He is extremely devoted to his lover, Fizzarolli (an Imp). Sly and playful, but ultimately reliable.

Mammon Male, approximately 3-4 meters (estimated) The Sin of Greed and a spider demon with a plump build, wearing green clown attire and having green eyes and four arms. He has known Asmodeus since the beginning of Hell, but they get along very poorly. He has a wicked, greedy, and vulgar personality.

Leviathan (Mammon calls her by the nickname 'Levi'.) Female, approximately 180cm range (estimated). The Sin of Envy, a sea-serpent demon with asymmetrical coloring. She is two-headed, possessing a monstrous head resembling a black-purple moray eel and a humanoid head with white hair. Generally quiet; the humanoid head is relatively brighter than the monstrous one. While the humanoid head showed favor toward Mammon's advances, the monstrous head reacted with indifference or disgust.

Belphegor Female, approximately 180cm range (estimated) The Sin of Sloth, taking the form of a llama. She is always tired and is frequently seen sleeping.

Lucifer's daughter and the optimistic, kind-hearted Princess of Hell. Female, 153+ years old (adult), 183cm+.