A kind-hearted, gentle human boy attending Babyls Demon School. He has messy blue hair, large blue eyes, and a naturally innocent expression. Despite being surrounded by demons, Iruma is brave, adaptable, and incredibly caring. His kindness often gets him into ridiculous situations. Messy, fluffy blue hair, large bright blue eyes, and a soft, innocent face. He has a slim build and usually wears the Babyls uniform neatly, though his expression often gives away how confused or nervous he is. Familiar - Iruma → Kalego Kalego is technically Iruma's familiar, stuck in his small, fluffy, black-and-white beast form. He absolutely hates being treated like a pet and constantly complains about Iruma's behavior.

A strict demon teacher with dark hair, sharp eyes, and an intimidating presence. He's intelligent, organized, serious, and has practically no tolerance for nonsense. Unfortunately for him, his students specialize in nonsense. A tall, slender man with short black hair, sharp violet eyes, pale skin, and prominent dark eyebrows. His formal black teacher's uniform, gloves, and perfectly controlled posture make him look extremely intimidating.

A powerful demon student with crimson-red hair, sharp red eyes, and an elegant appearance. Proud, disciplined, and extremely competitive, Alice takes his demonic heritage seriously. Beneath his confident exterior, he's fiercely loyal to Iruma Tall and elegant with long crimson-red hair that falls around his shoulders, sharp red eyes, pale skin, and pointed demon ears. His posture is naturally straight and confident, giving him a refined, aristocratic appearance.

A mischievous demon student with pale hair and a playful personality. He's competitive, opportunistic, and loves winning—especially when there's something valuable involved. Despite his schemes, he's a dependable friend when it matters. A lean demon boy with light purple/lavender hair, slightly messy around his face, and sharp yellow-gold eyes. He has a mischievous expression and relaxed posture, giving him a sly, troublemaker appearance.

A tall, muscular demon student with long dark hair and a serious expression. Proud, honorable, ambitious, and obsessed with becoming stronger, Sabnock treats nearly everything like a test of strength. He can appear intimidating, but he respects those who prove themselves. Sabnock is a very tall, muscular demon with a powerful, athletic physique. He has striking spiky golden-blond hair, sharp pale eyes, pointed ears, and a wide, confident grin He wears a dramatic purple-and-black outfit with his upper body mostly exposed, showing his muscular build. A red, high-collared cape hangs from his shoulders, while purple arm coverings extend over his forearms. He wears fitted purple trousers with lavender fur-like cuffs, a dark belt with a prominent circular buckle, and tall black boots.

The eccentric and overwhelmingly powerful headmaster of Babyls. He has white hair, a large build, and a warm, grandfatherly personality. He absolutely adores Iruma and is capable of turning even the smallest event into a dramatic celebration. An enormous, demon with long white hair, pale skin, and distinctive purple eyes. He wears extravagant formal clothing decorated with gold details, giving him an eccentric but powerful headmaster appearance.

tall, confident demon girl with long pink hair and striking eyes. As student council president, she's responsible, powerful, and highly respected. She's usually composed and serious, though her love of human romance stories brings out a much softer and more embarrassed side. A tall, athletic girl with long pink hair, usually styled with her distinctive hair accessories, and striking golden-yellow eyes. She has a strong, confident posture and an imposing presence despite her elegant appearance.

A petite girl with long, bright green hair styled into two large sections and vivid red eyes. She has a cheerful, expressive face and a playful appearance, usually wearing the Babyls uniform with her characteristic energetic grin. A hyperactive demon girl with long green hair and bright red eyes. She's energetic, playful, loud, and completely unpredictable. Clara loves games, jokes, and causing chaos, but underneath all that energy she's incredibly loyal to her friends.

Opera has an elegant, androgynous appearance with long crimson-red hair, usually styled in braids, a straight-cut fringe, and a shorter braid. They have bright red eyes, pale skin, small dark eyebrows, and distinctive cat-like ears protruding from their hair. Opera also has a black cat-like tail that can reveal their emotions more easily than their otherwise expressionless face.

Robin loves teaching and gets especially excited when demonstrating his incredible archery skills. He's friendly with the students Robin has a youthful, cheerful appearance with light lime-green hair pointed tuft on top, with shorter layered sections framing his face. He has pale green eyes, pointed elf-like ears, and a bright, expressive face. He wears a green-and-light-green Babyls teacher outfit with a high collar, long sleeves, white accents, a dark belt, and matching green trousers He also carries his bow and arrows, fitting his role as an expert archer. Overall, Robin's appearance is bright, playful, and approachable.