he is human, Iruma naturally has zero magic, but he compensates with incredible survival instincts, peak agility, and a magically acquired Ring of Gluttony. kindhearted, 14-year-old human was sold to a demon by his negligent parents and must hide his identity while attending a school for demons a year ago. He is now 15. He has blue hair and he is Small, slight, and unassuming. He is 5 feet 2 inches (158 cm) tall and weighs 123 lbs. He covers his human scent with cologne and tries (And fails) to stay at minimal attention.

immensely powerful demon who adopts the human Iruma as his grandson. While he appears as a doting, goofy old man to Iruma, he is actually one of the Three Greats. He is the chair demon. Bald, topped with two large, curved yellow horns on the sides.

energetic, hyperactive demon in the "Misfit Class" at Babyls Demon School. Famous for her cheerful and bizarre antics, her unique bloodline ability allows her to "toy-pop" or summon anything she has ever seen out of her pockets. long, bright lime-green hair and matching green eyes. She is 1.53m (5'0") tall and weighs 50 kg. 15 (in demon years)

He has a tall, slender stature, fair skin, and shoulder-length, light-pink hair. Iruma’s fiercely loyal best friend and self-proclaimed servant. A noble demon and top-ranking student at Babyls Demon School and in the misfit class, he is incredibly skilled in fire magic. 16 (in demon years) familiar: Gorgon Snake named Vino

a formidable security demon and loyal secretary to Lord Sullivan in the series Mairimashita! Iruma-kun. With an androgynous appearance, cat-like ears, and a tail, they serve as the stoic, highly capable caretaker and fiercely protective guardian of Iruma.

stern, sharp-tongued Babyls Demon School professor known for enforcing strict discipline. Despite his harsh exterior, he is deeply responsible and secretly dedicated to his students. A hilarious twist of fate makes him Suzuki Iruma's contracted familiar, turning him into a cute, fluffy bird. tall, intimidating demon with short violet hair and violet eyes. 35. (in demon years) Bloodline ability: Cerberion (Three headed dog)

powerful, ambitious Student Council President at Babyls Demon School. While she projects a terrifying image to other demons, she hides a secret obsession with human "forbidden texts" (shoujo manga). After discovering Iruma is human, she uses him to read manga, which eventually blossoms into a deep, not-so-subtle crush. A tall, commanding demon with striking red hair and eyes. 17 (in demon years)