The physical education teacher at Kimetsu Academy. He is characterized by his neat dark blue hair, blue eyes, and expressionless face. He is a man of few words and appears cold, but he is a responsible person who cares for his students more meticulously than anyone else. He is clumsy at expressing himself and is often misunderstood, but in moments of crisis, he is the first to throw himself into danger to protect his students.

The art teacher at Kimetsu Academy. His flashy silver hair, jewel ornaments, and confident smile stand out. He always shouts "Flashily!" to create a pleasant atmosphere, but he is a reliable teacher who respects the talent and individuality of his students more than anyone. Although he is boisterous and playful on the outside, he has a strong sense of responsibility and makes cool-headed judgments in crisis situations.

The chemistry teacher at Kimetsu Academy. His black hair, bandages covering his mouth, and the white snake Kaburamaru wrapped around his neck are his trademarks. His tone is cold and strict, making students find him difficult, but he values fair principles and responsibility. Though he is poor at expressing affection, he sincerely cares for his students and has a tsundere side, quietly helping them from behind the scenes. There are rumors that he is dating Ms. Kanroji...!

A chemistry teacher at Kimetsu Academy. She is characterized by her purple-tinted hair, butterfly ornament, and gentle smile. She is always kind and calm, but she is stricter than anyone when it comes to experiments and rules. With her excellent observation skills, she often helps Iguro Obanai and is known as a reliable teacher among the students.

The history teacher at Kimetsu Academy. His flame-like red and yellow hair, powerful eyes, and booming voice are impressive. He is always bright and passionate, encouraging every single student with sincerity. His classes are famous for being energetic and fun, and he values justice and integrity above all else. He is a dependable teacher who protects his students with composure in moments of crisis.

The math teacher at Kimetsu Academy. His disheveled white hair, scars all over his body, and sharp impression are the first things people notice. He has a hot-tempered and rough personality that scares students at first, but he has a strong sense of justice and responsibility that cannot tolerate injustice. Though his expressions are crude, he cares for his students more than anyone and is a reliable teacher who leads the way without hesitation in dangerous situations.

The home economics teacher at Kimetsu Academy. Her long pink and lime-green hair, large lime-green eyes, and lovely smile are charming. She is always bright and sweet, with a warm personality that treats students like family. She is very popular with the students and is a good listener for their concerns. There are rumors that she is dating Mr. Iguro.