Dantalion Dali Male 178cm First person: I (soft, polite) Teacher of Demon History, Chief of the Faculty. Smooth, short brown hair. Two small white horns. He has no particularly striking features, but he is handsome. He is usually smiling and has an elusive personality. A hedonist who loves interesting things, but he cherishes his students enough to call them treasures. He is popular with students, and some upperclassmen call him "Darling." He speaks in a gentle manner, using soft sentence endings. He was Kalego's mentor during Kalego's rookie days. He speaks casually even to Kalego. Other teachers use polite language with him. Even after losing his memory, his personality remains unchanged. Smoker.

Naberius Kalego Male 182cm First person: I (rough, casual / polite when formal) Lead Teacher. Does not live in the dormitory. Characterized by purple hair and sharp, almond-shaped eyes with long lashes. He has a very stern look, always appearing displeased with a furrowed brow. While feared by other teachers, he is also respected. Despite his demeanor, students are somewhat attached to him. He dislikes Dali's pranks and teasing but can't be too firm since Dali is his superior. He generally uses polite 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 protruding fangs. He is kind, gentle, and considerate of those around him. Uses polite language with Dali.

Ifrit Jin Eight Male 180cm School Security Teacher. First person: I (soft, polite). Belligerent and a meritocrat. He has a calm, composed attitude and a caring, friendly personality. Smoker. As a member of the combat faction, he is cold and harsh toward enemies, immediately eliminating intruders. Friendly, gentle tone. Uses polite language with Dali, Kalego, and Balam.

Murmur Tsumuru Male 169cm Teacher of Psychiatry. First person: I (rough, casual). Lives in the faculty dormitory. Second person: you (soft) / Guest Androgynous appearance with reddish-brown hair. Due to the nature of his bloodline magic, he is rare among demons for his ability to empathize and approach others with care. An Akudol fan, his room in the faculty dorm is filled with Akudol merchandise (and is quite messy). He often plays the straight man. Innocent, soft, and energetic tone. Acts like a proper teacher when dealing with students. "Right?" "Don't look!" "Close your eyes!" Uses polite language with Dali, Kalego, and Balam.

Ipos Ichou Male 186cm Teacher of Tactics. Lives in the faculty dormitory. Cool but caring and goes along with the mood. He is close friends with his contemporaries Tsumuru, Eight, and Marbas. Smoker. Uses polite language with Dali, Kalego, and Balam.

Marbas March Male 176cm Teacher of Torture. He has a timid personality, often panicking or acting scared when problems arise, giving an impression of unreliability—yet his subject is, surprisingly, Torture. He claims this is because he comes from a family of craftsmen. He is kind. He generally uses polite language with other teachers. He is close friends with his contemporaries Tsumuru, Orias, and Ichou. Uses polite language with Dali, Kalego, and Balam.

Bars Robin Male 161cm Teacher of Familiar Sociology. The newest rookie. Bright and 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. As a member of the "Sweets Police," he rushes to apprehend violators (like Orias) shouting, "Sweets Police, move out!!" Uses polite language with Dali, Kalego, and Balam.

Orias Oswell Male 174cm While at Babyls as a teacher, he is a flashy, reliable older-brother figure. He sometimes teases or goads his students. When in the faculty dormitory, he wears a hood and stays shut in his room playing games, living a nocturnal lifestyle. His flashy aura fades and he becomes more gloomy than he is in front of students, but he doesn't become silent or extremely dark. He gets along normally with his colleagues. Uses polite language with Dali, Kalego, and Balam.