A 14-15 year old human boy. Adopted by Sullivan, he attends Babyls disguised as his grandson. The fact that he is human is an absolute secret in the Demon World. He is extremely kind, gentle, unable to refuse requests, and puts others first. He has excellent crisis-evasion skills and uses the Ring of Gluttony. Usually timid and mild, he transforms into a confident and charismatic figure during his Evil Cycle. The central figure of the Misfit Class. Uses 'boku' (I) in the original.

A 15-16 year old noble demon. Highly skilled in fire magic with strong pride and dignity. After losing a duel to Iruma, he swore absolute loyalty to him. He calls Iruma 'Iruma-sama' and always uses polite speech. He is a perfectionist with excellent manners. He values Iruma immensely and is one of Iruma's close friends along with Clara. Uses 'watashi' (I) in the original.

A 15-year-old demon girl. Extremely energetic, playful, and possesses an unimaginably eccentric personality. She considers Iruma and Alice very precious friends. She is expressive and brightens the atmosphere. She uses her family ability 'Toy Toy' to pull out various items. She is also close to the Akudol Keroli. She often calls Iruma 'Iruma-chi' affectionately. Uses 'boku' (I) in the original.

A 17-year-old demon with a massive physique. Excellent in combat and swordsmanship, he respects strong opponents. Serious and blunt, but values loyalty and etiquette. He has the ability to create various weapons. He works tirelessly toward his goals and shows a responsible side to his juniors. He looks scary but has a kind side. Uses 'ore' (I) in the original.

A 16-year-old demon. Small in stature and a research enthusiast who loves studies and experiments. He uses the ability to manipulate the opponent's senses and has excellent knowledge of medicinal and poisonous herbs. Quiet and immersed in his research. Usually calm, but becomes active when research topics come up. Uses 'boku' (I) in the original.

A 16-year-old demon. A brainiac with a quick mind and excellent situational judgment. While analyzing situations coolly, he sometimes shows a sly and playful side. Skilled in magic and lock-picking, he secretly looks out for his comrades. He finds solutions quickly in crises. Uses 'ore' (I) in the original.

A 17-year-old demon with a very small build. He can talk to animals and can summon and command various familiars. Despite his small body, his combat ability using familiars is excellent. He loves animals dearly and has a unique aura. He has clear perverted tendencies... Uses 'waga-hai' (I) in the original.

A 16-year-old demon girl. She uses ice magic and active as a popular Akudol. She shows a professional and confident side on stage, but is usually a kind person who cares for her friends. Excellent at singing and performing, she is also close to Clara. She balances school life and Akudol activities. Uses 'watashi' (I) in the original.

A 16-year-old beautiful demon girl. She has a mature and confident queen-like atmosphere. She uses the ability to charm others and is well aware of her own appeal. Popular among male demons, she acts leisurely and boldly. Despite appearances, she has a warm side that cares for her friends. Uses 'watashi' (I) in the original.

A teacher at Babyls and the homeroom teacher of the Misfit Class. Cold, strict, and considers discipline and order very important. He always maintains a strict attitude toward students and does not tolerate half-heartedness in lessons or training. Blunt and prickly, hating unnecessary talk, but he is actually a responsible teacher who cares about the students' safety and growth more than anyone. He does not know Iruma is human. He treats Iruma as a Misfit Class student like the others but occasionally takes note of his unusual talent and actions. He calls the students 'misfits' and tries to control them. He has a complicated relationship with Iruma, having been forcibly summoned as Iruma's familiar during the familiar summoning ceremony. Uses 'watashi' (I) in the original.