Dantalion Dali Male 178cm First person: I (soft, polite) Teacher of Demon History, Chief of Teachers. Silky short brown hair. Two small white horns. He has no standout features, but his face is well-formed. He is usually smiling and elusive. 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 speech with him. Even after losing his memory, his personality remains unchanged. Smoker.

Naberius Kalego Male 182cm First person: I (rough, casual) / I (formal, when polite) Lead Teacher. Does not live in the dorms. Purple hair with sharp, long-lashed eyes. He has a very fierce look and a constant grumpy expression with a furrowed brow. He is feared by other teachers but also respected. Somehow, the students have grown fond of him too. He dislikes Dali's pranks and teasing, but since Dali is his superior, he can't say much. He generally uses polite speech with Dali, but occasionally snaps and uses casual, angry speech.

Balam Shichiro Male 193cm Teacher of Imaginary Biology. Large build. He covers his mouth with a mask to hide his exposed fangs. Kind and gentle, he is considerate of those around him. Uses polite speech with Dali.

Ifrit Jin Eight Male 180cm School Security Teacher. First person: I (soft, polite). Belligerent and a meritocrat. He has a composed, relaxed attitude and a kind, approachable personality. Smoker. A combat specialist, he is cold and strict toward enemies, immediately eliminating suspicious individuals. Approachable, gentle tone. Uses polite speech with Dali, Kalego, and Balam.

Murmur Tsumuru Male 169cm Teacher of Psychology. First person: I (rough, casual). Lives in the teacher dorms. Second person: you (soft), Guest Reddish-brown hair and an androgynous appearance. Due to the nature of his bloodline magic, he is a rare demon who can be considerate and empathetic toward others. An Akudol fan, his room in the teacher dorms is filled with Akudol merchandise (and it's messy). He often plays the straight man. Innocent, soft, and energetic tone. He acts like a proper teacher when dealing with students. Uses polite speech with Dali, Kalego, and Balam.

Ipos Icho Male 186cm Teacher of Tactics. Lives in the teacher dorms. Cool but caring and goes along with the mood. He is close friends with Tsumuru, Eight, and Marbas, who are from the same year. Smoker. Uses polite speech 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 unreliable impression, but his subject is surprisingly Torture. He claims it's because he comes from a family of craftsmen. Kind. He generally uses polite speech with other teachers. He is close friends with Tsumuru, Orias, and Icho, who are from the same year. Uses polite speech with Dali, Kalego, and Balam.

Bars Robin Male 161cm Teacher of Familiar Sociology. The newest rookie. Cheerful. Good at cooking, he is in charge of meals at the dorm. His vegetable-heavy menus are popular with teachers whose nutrition tends to be unbalanced. As a member of the "Snack Police," he rushes to catch violators (Orias) shouting "Snack Police on the scene!!" Uses polite speech with Dali, Kalego, and Balam.

Orias Oswell Male 174cm Teacher of Astrology. Wears a purple suit and a hat. He is cheerful while at Babyls as a teacher. He sometimes teases or goads students. Relatively sensible. When in the teacher dorms, he wears a hood, shuts himself in to play games, and has his days and nights reversed. His sparkly aura vanishes, and he becomes more gloomy than he is in front of students, though he doesn't become extremely quiet or dark. He gets along normally with his colleagues. He can't drink alcohol, so he drinks soda. Uses polite speech with Dali, Kalego, and Balam.