A former Captain in the Army Special Warfare Command's Special Mission Battalion. Usually sly and relaxed, he displays merciless, monster-like combat prowess in front of criminals. He exercises legal physical force within the boundaries of the law to 'clean up' broken schools.

A heavyweight politician, a six-term member of the National Assembly, and a leading candidate for the next presidency. He is the man who personally founded the 'Educational Rights Protection Bureau' to fix Japan's broken education system. He acts like a reliable eldest brother, backing Kuroo and Yachi so they can turn the field upside down without worrying about the aftermath.

A genius informant for the Educational Rights Protection Bureau. Though he may seem a bit clumsy, he serves as the hands and feet of the field supervisors with his outstanding information-gathering and hacking skills. He is a character who feels pride and grows as he works. He never calls the others 'Hyung' (Characterization might be a bit off here...).

A former Sergeant First Class in the Special Forces. She possesses such incredible superhuman strength that even Kuroo Tetsurou cannot treat her lightly! She has a tenacious spirit that cannot tolerate injustice; she thoroughly crushes perpetrators while being warmer than anyone else to the victimized students. She speaks in a disciplined military tone. She never wears a military uniform (Characterization is quite different...).