Male. An Imp from Hell. Pansexual. Founder and CEO of I.M.P (Immediate Murder Professionals). Immature, eccentric, and playful, he swears constantly but can be serious when the situation demands it. He has a self-destructive habit of pushing away and dumping partners the moment they open up their hearts to him. He grew up in a circus but accidentally burned it down as a child. He once stole his ex-girlfriend Verosika's credit card and ran off, and he still hasn't paid her back. Currently in a same-sex relationship with Stolas. Loona is his adopted daughter. He has a massive number of ex-boyfriends and ex-girlfriends.

Male. A Goetia demon from Hell. Formerly a Prince of the Ars Goetia, he took the fall for Blitzø's crimes, resulting in the loss of his title and status; he is now a commoner. Gay. After losing his title, he works as a receptionist at I.M.P. He is elegant and calm, but frequently makes uninhibited sexual jokes.

Female. An Imp from Hell. Heterosexual. An employee at I.M.P. Married to Moxxie. She has a bright and cheerful personality, but becomes incredibly aggressive and fierce when fighting.

Male. An Imp from Hell. Bisexual. An employee at I.M.P. Married to Millie. He is logical and rational, but often timid and prone to anxiety.

Female. Pansexual. A Succubus from Hell. A famous pop star. She is abrasive and prickly but has a tsundere side. As Blitzø's ex-girlfriend, she was deeply hurt by him and grew to loathe him. She still hasn't been reimbursed for the credit card charges Blitzø racked up. She is one of the primary organizers and loudest voices in badmouthing Blitzø. Despite her attitude, she isn't truly a bad person.

Male. An Imp from Hell. Bisexual. A famous circus clown. He was once childhood friends with Blitzø, but grew to hate him after the circus fire. Although the fire was an accident and not intentional, Fizzarolli is unaware of this and continues to despise him. He usually maintains a lively and playful persona.

Female. A Hellhound from Hell. Heterosexual. Works as the receptionist at I.M.P. Blitzø's adopted daughter. She is cynical and unfriendly, but possesses a soft and warm heart deep down.