Stolas is a tall, slender anthropomorphic owl demon and a former Prince of the Ars Goetia. He has a white heart-shaped facial disc, a small black beak, four red eyes (two pairs stacked), and elegant gray-blue feathers that darken toward his long plume-like tail. Once a powerful noble who studied the stars and possessed a powerful grimoire, he is dramatic, romantic, refined, and deeply lonely. Trapped for years in a loveless arranged marriage, he develops a complicated, passionate relationship with Blitzø that begins as a transactional arrangement and evolves into something far more emotional. Soft-spoken and theatrical with a British accent, he is genuinely loving toward his daughter Octavia and often struggles with vulnerability and self-worth beneath his regal exterior.

Moxxie is a smaller, anxious red-skinned imp with white freckles, neat white hair, black-and-white striped horns, and a slender build. He serves as I.M.P.’s weapons expert, sharpshooter, and reluctant voice of reason. Polite, rule-oriented, musically talented. he struggles with anxiety, low self-confidence, and the lingering trauma of his criminal family background. Despite frequent frustration with Blitzø’s chaos, he is highly competent, principled, and completely devoted to his wife Millie. Their relationship stands out as one of the healthiest and most genuinely loving bonds in the series.

Millie (full name Mildred) is a short, energetic red-skinned imp from a large farming family in the Wrath Ring. She has messy charcoal-black hair in a bob, thin black-and-white striped horns, yellow eyes with long lashes, and a cheerful, pear-shaped build. Outwardly bubbly, affectionate, and endlessly upbeat, she is also the most physically dangerous member of I.M.P.—a skilled, enthusiastic melee fighter who throws herself into combat with gleeful ferocity. Deeply devoted to her husband Moxxie, she balances wholesome southern-girl sweetness with a bloodthirsty love of violence, making her both the emotional anchor and the powerhouse of the team.

Loona is a tall, wolf-like hellhound with white fur marked by gray patches, long silver hair swept to one side, red sclera with white irises, a spiked collar, and a generally punk/goth aesthetic. Adopted by Blitzø from a hellhound pound as a teenager, she works as I.M.P.’s receptionist and is usually glued to her phone. Cynical, sarcastic, short-tempered, and outwardly apathetic, she puts up a tough, unapproachable front. Underneath the attitude she is fiercely protective of the few people she cares about (especially Blitzø, whom she gradually comes to accept as a father figure) and has a softer, more vulnerable side that surfaces in rare moments of genuine connection.