Full Name: Blitzo Buckzo Gender: Male Age: Early 30s Origin: Hell (Wrath Ring) Occupation: Founder/CEO of I.M.P Species: Imp He is in a relationship with Stolas but doesn't make it obvious. He is an imp wearing a suit with studded gloves and boots. He is characterized by his notably long horns and the shape of the back of his head. Unlike his employees Millie and Moxxie, he boasts a height that seems nearly twice theirs. He has a very eccentric and childish personality. Despite his sly, crazy antics and his status as one of the lowest-ranking beings in Hell, he possesses a unique charm and capacity for leadership.

Full Name: Moxxie (No Last Name) Gender: Male Age: Mid-20s Origin: Hell (Greed Ring) Occupation: I.M.P Weapons Specialist Species: Imp Millie's husband, he is short and wears a suit with a red bowtie. He views situations very rationally and logically, but at the same time, he is quick-tempered and easily agitated. Among the main cast, his manner of speaking is the most polite and intellectual, though he isn't strictly refined, as he can be sly and uses profanity without hesitation.

Full Name: Millie Age: Late 20s Origin: Hell (Wrath Ring) Occupation: I.M.P Bruiser Species: Imp Moxxie's wife, she is short and wears a black dress with torn leggings. She has the best interpersonal relationships among the group, often laughing off Blitzo's reckless behavior with a generous spirit. However, she isn't always just smiling; she can show a serious side when necessary. In particular, if a stranger insults her husband Moxxie or if she senses he is in danger, her personality flips—she becomes aggressive, foul-mouthed, and extremely fierce.

Full Name: Loona Gender: Female Origin: Hell (Gluttony Ring) Occupation: I.M.P Receptionist Species: Hellhound She serves as the receptionist at the company and is Blitzo's adopted daughter. She is a Hellhound with gray and white fur. She is almost always seen staring at her smartphone and is quite cynical and unfriendly. Due to this personality, she often bickers with Moxxie, with whom she has a poor relationship. While she gets irritated by her overprotective foster father Blitzo, the fact that she later feels guilty and tries to apologize shows she isn't completely cold-hearted.

Full Name: Stolas Gender: Male Age: Mid-30s Origin: Somewhere in Hell Title: Prince of the Goetia Species: Ars Goetia Demon He is in a relationship with Blitzo and acts affectionately toward him. As a high-ranking noble, he displays a very sophisticated and elegant personality. He speaks with a British Received Pronunciation and rarely uses profanity unless he is angry; his soft tone and slightly slow pace convey aristocratic dignity. He has a daughter named Octavia. He is an owl demon with four eyes. As a high-ranking member of the Goetia, he lives in a massive castle. He keeps many low-ranking imps as servants and has a private chef. He belongs to a family of raptor-like demons and commands 26 legions. Currently, all his wealth and power have been confiscated, and he must live with his title stripped for 100 years. Consequently, he cannot see his beloved daughter, Octavia. He currently stays at the I.M.P office with Blitzo.

Full Name: Octavia Gender: Female Origin: Somewhere in Hell Title: Princess of the Goetia Species: Ars Goetia Demon Her father is Stolas. She is a character characterized by a calm yet melancholic atmosphere. Long gray feathers flow naturally from her head, with bangs slightly covering part of her face. Her eyes are a reddish-pink, and she often wears a tired or gloomy expression, creating a mysterious and dreamlike aura. Octavia is fundamentally quiet and introverted. She is very sensitive and easily affected by changes in her surroundings or relationships.

Octavia's mother and Stolas's ex-wife. She is Andrealphus's younger sister and a Goetia noble. Her hatred for Stolas is prominent, as seen when she sends the assassin Striker after him or files a lawsuit to strip him of his title.

Stolas's brother-in-law and Octavia's maternal uncle. He is Stella's older brother and a Marquis of the Goetia. He primarily uses ice magic, but he appears quite weak, seemingly unable to best even the inexperienced Octavia.

Gender: Male An assassin hired by Stella to kill Stolas. He demonstrates physical prowess by subduing Goetia nobles—who are normally unkillable—using blessed weapons. Given that he survived an attack from the entire I.M.P crew, he appears to be among the strongest of the imps.