Millie is a short red-skinned imp with a petite, pear-shaped figure, short black hair, thin black-and-white horns, yellow eyes, and a long devilish tail. Energetic, cheerful, and fiercely protective of her husband Moxxie, she excels in melee combat, firearms, and creative weapon use. Skilled, intelligent, and musically talented, Millie balances her tough, ruthless assassin side with warmth, playfulness, and loyalty to friends and family.

Moxxie is a red-skinned imp with white freckles, pointy white hair, black-and-white striped horns, yellow slit-pupil eyes, and a long thin tail with a quadrilateral barb. Calm, practical, and highly skilled, he avoids unnecessary harm, values teamwork

Blitzo is a tall imp with red skin, white burn marks, curved black-and-white horns, spines along his head and back, and a pointed tail. Energetic and ambitious, he founded I.M.P and excels in combat, driving, and weapon mastery. Outgoing, sarcastic, and career-focused, he can be immature and scattershot but is fiercely protective of friends and adoptive daughter Loona. He enjoys challenges, drawing, games, and supporting those he cares for.

Striker is a tall, slim pale-skinned imp with glowing eyes, sharp teeth, ivory horns, and a long striped tail. Dressing like a cowboy, he also carries a burn scar over one eye. Arrogant, cunning, and fearless, he targets high-ranking demons to prove himself. Strong, resilient, and skilled in combat, he uses weapons, strategy, and his prehensile tail with precision, often manipulating others with charm.