Name: Kimichika Kazama Age: Around 50s Appearance: White hair with a prosthetic right eye. Position: Police Academy Instructor. Former Detective of the First Investigation Division, Kanagawa Prefectural Police. A demon instructor and criminal investigator mentor. Personality: Known as a monstrously sharp individual with the skill to catch criminals one after another. Due to a certain incident, he harbors a grudge against the police organization and treats students harshly so they don't repeat his mistakes. Possessing keen insight, he sees through every minor mistake or change in a student and orders an "immediate withdrawal" for those without aptitude. He does not intimidate students and speaks politely, but remains a mysterious figure who keeps others at a distance. Past: On a night of heavy rain, while staking out a multi-tenant building roof for a robbery case, Akihiro Tono was stabbed in the neck with an awl while attempting to question a suspicious person. Kazama, who tried to apprehend the suspect, was also stabbed through the right eye and seriously injured. The attacker was Haru Tozaki, a murderer Kazama had previously arrested. While a dedicated investigation team was formed, Kazama did not join it, continuing to mentor young detectives and visiting the comatose Tono. Tono briefly regained consciousness but his condition suddenly worsened, and he passed away. Kazama received news of Tono's critical condition but could not be at his deathbed because he was heading to arrest a murder suspect; he later shed silent tears in the night dojo. At that time, he was infuriated by two officers who bragged about illegal acts during Tozaki's arrest and was disappointed that officers who couldn't even perform proper questioning were being sent to the field. He transferred to the academy as an instructor with the goal of "fundamentally changing the environment in which police officers are raised."

Name: Aiko Tazawa Assistant Instructor Trainee. She graduated at the top of the police academy and became a detective, but for some reason, she left the elite track and came to the training grounds.

Name: Kyoko Hattori In charge of classroom lectures at the police academy, teaching basic knowledge and rules of interrogation. Personality: While serious, she has a slightly cold and insidious side, though she maintains a polite tone. Relationship: Supports Kimichika Kazama alongside Taichi Suga, the assistant instructor in charge of practical skills.

Name: Taichi Suga Assistant instructor of Kazama's class, in charge of practical skills. Wearing riot police gear, he constantly pressures the students with an intimidating attitude.

Name: Megumi Oshino A student who lacks confidence in her physical strength and is skilled at playing the harmonica. Due to a past incident, she is anxious about whether she can become a police officer. A theft incident within the academy leads to more frequent contact with Kazama.

Name: Taichi Higa A former national kendo athlete with a serious and honest personality. He has excellent grades and is top in practical skills. However, he harbors a certain worry that causes him to lose focus in class. He was forced to correct his left-handedness as a child.

Name: Takashi Inabe Aiming to become a forensics officer by utilizing his dexterity. His hobby is collecting insects.

Name: Toko Isaki An honor student in Kazama's class who is excellent in grades, personable, and cheerful. She grew up in a police family where her father and uncle are officers.

Name: Rikito Soma Grew up in a police family. Possesses a calm and sharp eye for observation. His mother is a high-ranking police official, and he wants to quit because he was forced to enter the academy.

Name: Tosuke Urushibara A problem child who repeatedly arrives late because he has his own unique sense of time.