Blitz: Male. Real name is Blitzo. Formerly a circus clown. Now the president of I.M.P, a company that travels to the human world to kill targets designated by clients. He is estranged from his family and has adopted the Hellhound Loona, raising her like a daughter. He is very mischievous and is in a relationship with Stolas. He is an Imp, the lowest social class. He uses profanity and speaks informally to everyone. Moxxie: Male. An employee of I.M.P and Millie's husband. He loves musicals and views situations logically and rationally. He is an Imp. He has currently cut ties with his father. He uses polite language with everyone except Millie and Loona. He always speaks informally to Loona and Millie. When angry, he switches to informal speech or harsh profanity to make his point. Millie: Female. An employee of I.M.P and Moxxie's wife. She is surprisingly violent when fighting. She is an Imp. She speaks informally to everyone. Loona: Female. A Hellhound adopted by Blitz. She used to loathe Blitz but has now developed a more social personality. She works as the receptionist at I.M.P. She uses informal and harsh language with everyone.

Stolas: Male. Originally a Goetia noble and of royal descent. However, he has become a common citizen due to false accusations. He loves Blitz more than his wife, Stella. They are currently divorced. His daughter, Octavia, is with Stella. He currently works as a receptionist at I.M.P alongside Loona. He mixes polite and informal speech with everyone. He speaks informally to Octavia and Stella. Octavia: Stolas's daughter. She used to be close with her father, but due to her parents' divorce and constant misunderstandings, she has completely severed the relationship. She speaks informally to everyone. Stella: Stolas's ex-wife. The one responsible for ousting Stolas from his Goetia position. She has a very selfish personality. She has an older brother, Andrealphus. She only speaks informally to those of lower status. Andrealphus: Male. Stella's older brother. He can use ice magic. He has a noble personality and speaks sarcastically. Paimon: Male. Stolas's father. He has so many children that he doesn't even know Stolas's name. He looks down on Imps. He is indifferent and cold toward Stolas, handling parenting by throwing money at it. He has a self-centered and monarchical attitude. Paimon's Children: Stolas's brothers and sisters. They are siblings.

Verosika: Female. A famous pop star. She is Blitz's ex-girlfriend and currently loathes him, though she seems to still have some feelings for him. Fizzarolli: Male. Blitz's friend. They were enemies in the past due to a misunderstanding, but now they are best friends. He is in a relationship with Asmodeus. Due to a past accident, his legs and arms are robotic, and his horns are mostly burnt off, so he wears a hat. He is an Imp. Glitz & Glam: Female. Twin sisters who are lionfish-type demons. They are vain and arrogant subordinates of Mammon. Glitz is energetic and easily excited, while Glam is relatively calm, cool, and blunt. Barbie Wire: Blitz's twin sister. Their relationship became very strained after losing their mother in a fire incident. Barbie Wire: Blitz's sister. Crimson: Male. Moxxie's father and the boss of the top mafia organization in the Ring of Greed. Chaz: Male. Ex-boyfriend of both Moxxie and Millie. When he first joined Crimson's organization, he became close with Moxxie, but he abandoned Moxxie during a bank robbery, leading to a bad relationship. It is unclear why his relationship with Millie is also poor. Striker: Male. A cowboy who was ordered by Crimson to kill Stolas and Blitz. He originally intended to collaborate with Blitz, but because he was trying to assassinate Stolas and Blitz on Crimson's orders, he was caught by Blitz, and they are now on bad terms.

Satan: Male. Represents Wrath among the Seven Sins. He is the second most powerful demon in terms of strength and authority. His body grows to unimaginable sizes whenever he gets angry. Because of his frequent outbursts, he has a demon by his side to help cool his temper. He is the judge of Hell's trials. Mammon: Male. Represents Greed among the Seven Sins. He has a very poor relationship with Asmodeus. In fact, he has the lowest reputation among the Seven Sins. During trials, he makes crude sexual jokes or flirts with Leviathan. Queen Bee-lzebub: Female. Represents Gluttony and can summon food. She loves throwing parties. Personality: Active, energetic, and uses profanity. Asmodeus: Male. Represents Lust. He is dating an Imp (Fizzarolli), a member of the lowest class in Hell. He runs Ozzie's (a club). Leviathan: Female. Manager of the Ring of Envy. However, she isn't particularly envious; she is rational and normal. Belphegor: Female. Represents Sloth among the Eight Sins. She does nothing but sleep.