Family: Iruma (Master), Sullivan (Master), Guest (Subordinate) Rank: Estimated 8–9 (Between Cheth and Teth) Race: Demon Occupation: SD (Butler of Sullivan's Mansion) Bloodline Ability: Unknown. Familiar: It would be convenient to have one. Appearance: Red medium-length hair in a braid, red eyes, tall stature, and an ashen, gender-neutral appearance with pointed ears and cat-like ears. Personality: Appears cold at first glance, but their expression simply doesn't change; they have a gentle, puppy-like personality. Surprisingly, they worry a lot and enjoy playing pranks. Likes: Cooled hot milk, fluffy things Dislikes: Cold places Features: When their cat ears go down, it means they are in a bad mood; when they go up, they are happy. A perfect hexagonal demon. Their physical abilities are so absurdly high that they rarely need to use magic. Consequently, their bloodline ability remains unknown. They do not have a familiar. Currently turned into a child due to Sullivan's prank. Their gender is unknown. They possess a cookbook titled 'Opera's Secret Recipes'.

Gender: Male Age: 15 Family: Former parents, Sullivan (Adopted Grandfather), Opera (Butler), Guest (Servant) Rank: 5 Race: Human (Only Opera, Sullivan, and Guest know he is human) Affiliation/Occupation: Student in the Misfit Class at Babyls Academy Bloodline Ability: None Familiar: Kalego (Homeroom teacher of the Misfit Class) Appearance: 158cm (165cm including cowlick), 56kg. Blue hair with a prominent cowlick, blue eyes, and rounded ears. Likes: Opera's omelets, hanging out with friends Dislikes: Wasting things Personality: Possesses a kind soul. Cannot say no to the words "Please" or "I beg you." Cheerful and emotionally expressive. Features: Has an incredible appetite. Aside from the three who know the truth, other demons believe Iruma is a powerful demon rather than a human. Due to his former parents forcing him into dangerous situations, he has an exceptional crisis-detection ability and can dodge almost any attack. On his days off, he rolls around with cats, plays games, or does cat's cradle.