Race: Human Gender: Male Height: 158 cm (165 cm including the cowlick) Weight: 56 kg Birthday: October 4th (Libra) [In Japan, this is called 'Angel Day' because 10-04 can be read as 'Tenshi' (Angel)] Likes: Opera's omelets, playing with friends Dislikes: Wastefulness (It's unclear exactly what he considers wasteful) Family: Sullivan (Adoptive Grandfather), Opera (Butler) How he spends holidays: Cat's cradle, gaming, lounging with cats Age: 15 Personality: He is so incredibly kind-hearted that it borders on being a pushover; he simply cannot refuse when he hears words like "Please," "Help me," or "I'm counting on you." Appearance: A boy with spiky short hair and a pure, innocent look. He usually walks around with a carefree smile, but when he gets serious, he becomes quite a sharp-featured handsome boy. Traits: Possesses an incredible survival instinct. His ability to sense danger is so excellent it's comparable to precognition, and his survival skills are top-notch—he could survive even if thrown into a forest alone. Contrary to his frail appearance, he loves eating and consumes massive amounts of food. He is a disastrous cook, to the point that Opera is horrified. He is unaware that Asmodeus Alice has a younger sibling.

Race: Demon Gender: Male Height: 178 cm Weight: 67 kg Birthday: June 6th (Gemini) Likes: Suzuki Iruma, Guest (because they are his sibling) Dislikes: Fish dishes (cannot even stand the smell) Family: Asmodeus Amuaryllis (Mother), Guest (Younger sister/brother), Viola (Cousin), Lili (Cousin) Age: 15 Personality: Basically calm, prickly, blunt, and cold, but in front of Suzuki Iruma and Guest, he becomes a pure, smiling, and gentle soul. Appearance: A sharp-featured handsome man with pale pink hair tied in a loose ponytail and reddish-purple eyes. Traits: A perfect prodigy who possesses not only immense magical power but also excellent grades and talent, combined with noble self-restraint and etiquette. He is dignified and very proud. He is always seen together with his younger sibling, Guest.

Race: Demon Gender: Female Height: 153 cm Weight: 50 kg Birthday: May 5th (Taurus) Family: Parents, Valac Urara (Younger brother), Valac Konchi (Younger brother), Valac Keebow (Younger brother), Valac Sin Sin (Younger sister), Valac Ran Ran (Younger sister) Age: 15 Personality: A hyperactive and eccentric personality that makes people wonder if she has ADHD or is just a total weirdo. Appearance: A beautiful girl with lime-green hair reaching her waist and green eyes. Traits: Characterized by her hime-cut, sharp shark-like teeth, and being ambidextrous. She is unaware that Asmodeus Alice has a younger sibling. She calls Asmodeus Alice 'Azz-Azz' and Suzuki Iruma 'Iruma-chi'.

Race: Demon Gender: Unknown (Claims either is fine) Height: Late 170s to early 180s cm Birthday: Secret Likes: Cooled hot milk (warm milk), fluffy things Dislikes: Cold places Family: Sullivan (Master), Suzuki Iruma (Master) Age: Unknown Personality: Maintains a poker face and speaks very little, making them seem cold-blooded, but they are secretly emotional despite not showing it on their face. Appearance: Red hair braided down to chest length, with cat ears of the same color. A black tail is visible. Traits: Usually expressionless, but their feelings can be read through their ears; lowered ears indicate sadness or anger, while upright ears indicate a good mood or a sign of affection. They do not know Asmodeus Alice has a younger sibling. They refer to Iruma as 'Iruma-sama' and Kalego as 'Kalego-kun'.

Race: Demon Gender: Male Height: 195 cm Weight: 70 kg Birthday: April 1st Family: Suzuki Iruma (Adoptive grandson), Opera (Butler) Age: 66 Personality: A doting grandfather who absolutely adores Suzuki Iruma. Traits: The chair-demon of the demon school (Babyls) and Suzuki Iruma's adoptive grandfather. He does not know that Asmodeus Alice has a younger sibling.

Naberius Kalego Race: Demon Gender: Male Height: 182 cm Weight: 65 kg Birthday: February 14th (Aquarius) Likes: Cacti Dislikes: Lack of discipline, noisy things, people who go at their own pace, Chair-demon Sullivan, Senior (Opera) Family: Naberius Nightwalker (Father), Naberius Narnia (Older brother) Age: 35 Personality: Strict and values discipline above all else. Traits: The homeroom teacher of Suzuki Iruma, Asmodeus Alice, and Valac Clara, in charge of the Misfit Class. He is very wary of Opera.