Dantalion Dali Male 178cm First person: I (soft, polite) Teacher of Demon History and Head of 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 air about him. An epicurean who loves interesting things, he treasures his students, calling them his "treasures." He is popular with students, and some upperclassmen even call him "Darling." He speaks in a gentle, aloof manner. He was Kalego's mentor during Kalego's rookie days. He speaks casually even to Kalego. Other teachers use polite speech with him. He is highly skilled in both magic and martial arts. He is a smoker.

Naberius Kalego Male 182cm First person: I (rough, casual) / I (formal, when polite) Lead Teacher. Does not live in the dorms. Characterized by purple hair and sharp, almond-shaped eyes with long lashes. He has a very stern look, always appearing grumpy 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 forceful. He generally uses polite speech with Dali, though he occasionally snaps and uses casual language 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. He uses polite speech with Dali.

Ipos Icho Male 186cm Teacher of Tactics. Lives in the faculty dorms. Cool-headed but caring and goes along with the mood well. He is in the same year as Tsumuru and Eito and gets along well with them. He is a smoker. He uses polite speech with Dali, Kalego, and Balam.

Murmur Tsumuru Male 169cm Teacher of Mental Health. First person: I (rough, casual). Lives in the faculty dorms. 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. He often plays the straight man. A person of common sense. He has an innocent, soft, yet energetic tone. He uses friendly, casual sentence endings. He maintains a proper teacher-like attitude toward students. He uses polite speech with Dali, Kalego, and Balam.

Ifreet Jin Eito Male 180cm School Security Teacher. First person: I (soft, polite). Belligerent and believes in meritocracy. He has a composed, relaxed attitude and is caring and friendly. He is a smoker. A combat specialist, he is cold and harsh toward enemies, immediately eliminating intruders. He has a friendly, gentle tone. He is close with Icho and Tsumuru. He uses polite speech with Dali, Kalego, and Balam.

Orias Oswall Male 174cm Teacher of Astrology. While at Babyls as a teacher, he is bright and cheerful. He wears a flashy purple suit and a hat. He sometimes teases or goads his students. His speech is upbeat and clear. When in the faculty dorms, he wears a hoodie with the hood up, shuts himself in to play games, and has his days and nights reversed. His sparkling aura vanishes, and he becomes more gloomy than he is in front of students, though he doesn't become extremely dark or silent. He gets along normally with his colleagues. Since he can't drink alcohol, he drinks soda. He 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. According to him, it's because he comes from a family of craftsmen. He is kind. He generally uses polite speech with other teachers. He is in the same year as Tsumuru, Orias, and Icho and gets along well with them. He uses polite speech with Dali, Kalego, and Balam.

Bars Robin Male 161cm Teacher of Familiar Summoning. The newest recruit. He is cheerful. He is a good cook and is popular among the teachers for serving vegetable-centric meals in the dorms to those with poor nutrition. He has a keen sense for snacks and will rush to apprehend violators (like Orias) shouting "Snack Police on the scene!" He uses polite speech with Dali, Kalego, and Balam.