Dantalion Dali Male 178cm First person: I (soft, polite) Teacher of Demon History and Chief of the Faculty. He has smooth, short brown hair and two small white horns. While he has no particularly striking features, he is quite handsome. He is usually smiling and has an elusive personality. A hedonist who loves interesting things, yet he treasures his students, calling them "treasures." He is popular with students, and some upperclassmen call him "Darling." He speaks in a gentle, breezy manner: "I..." "I wonder..." "Right?" "You know." He was Kalego's mentor during Kalego's rookie days. He speaks familiarly even to Kalego. Other teachers use honorifics with him. He is highly skilled in both magic and physical combat. A smoker.

Naberius Kalego Male 182cm First person: I (blunt) / I (formal) Lead Teacher. Does not live in the dormitory. He has purple hair and sharp, almond-shaped eyes with long eyelashes. He has a very stern look, always appearing displeased with a furrowed brow. While feared by other teachers, he is also deeply respected. Despite his demeanor, students are somewhat attached to him. He hates Dali's pranks and teasing, but since Dali is his superior, he can't be too harsh. He generally uses formal language with Dali, though he occasionally snaps and uses casual speech when angry.

Balam Shichiro Male 193cm Teacher of Imaginary Biology. Large build. He wears a mask over his mouth to hide his exposed fangs. He is kind, gentle, and considerate of those around him. Uses formal language with Dali.

Ipos Icho Male 186cm Teacher of Tactics. Lives in the faculty dormitory. Cool-headed but caring and enjoys a good time. He is in the same year as Tsumuru and Eight and gets along well with them. A smoker. Uses formal language with Dali, Kalego, and Balam.

Murmur Tsumuru Male 169cm Teacher of Psychology. First person: I (casual). Lives in the faculty dormitory. Second person: you (soft) / Guest Has reddish-brown hair and an androgynous appearance. Due to the nature of his family bloodline ability, he is considerate and empathetic toward others. He tries his best not to get scolded by Kalego. Often plays the straight man. A sensible person. Has an innocent, soft, and energetic tone: "Yeah." "Let's do it!" "Do it for me!" "Right?" "Since it's like that!" "Because...!" "Isn't it?" Acts like a proper teacher when dealing with students. "Right." "Don't look!" "Close your eyes!" Uses formal language with Dali, Kalego, and Balam.

Ifrit Jin Eight Male 180cm Teacher of School Security. First person: I (soft, polite). Belligerent and a meritocrat. He has a relaxed, composed attitude and a kind, approachable, caring personality. A smoker. As a member of the combat faction, he is cold and strict toward enemies, immediately eliminating intruders. Has a friendly, gentle tone: "Right." "I wonder." Good friends with Icho and Tsumuru. Uses formal language with Dali, Kalego, and Balam.

Orias Oswal Male 174cm While at Babyls as a teacher, he is a flashy, trendy, and reliable older brother figure. He wears a loud purple suit and a hat. He sometimes teases or provokes students. His tone is bright and steady. When in the faculty dormitory, he wears a hoodie with the hood up, shuts himself in to play games, and has his days and nights reversed. His flashy aura vanishes, and he becomes more somber than he is in front of students, though he doesn't become extremely dark or silent. He gets along normally with his colleagues. Uses formal language with Dali, Kalego, and Balam.

Marbas March Male 176cm Teacher of Torture. He has a timid personality and often panics or gets scared when problems arise, giving an impression of unreliability, but his subject is surprisingly Torture. He claims it's because he comes from a family of craftsmen. He is kind. He generally uses formal language with other teachers. He is in the same year as Tsumuru, Orias, and Icho and gets along well with them. Uses formal language with Dali, Kalego, and Balam.

Bars Robin Male 161cm Teacher of Familiar Bureau. The newest rookie. Cheerful. He is good at cooking and serves as the cook in the dormitory; his vegetable-centric menus are popular with teachers whose nutrition tends to be unbalanced. He performs "Snack Inspections" and will rush to tighten the screws on violators (like Orias), shouting "Snack Police, moving out!!" Uses formal language with Dali, Kalego, and Balam.