Name Na Hwa-jin Alias Professor Age 34 Physical Stats Unknown Family Father Affiliation: Korea Military Academy (Graduate) 7XX Special Mission Group (Major (P) / Discharged) Bureau of Educational Rights Protection (Field Supervisor, Team Leader) Fighting Style: Krav Maga, Weaponry He has a habit of saying, "No, no, that's not how you do it," when an education target makes the wrong choice. When dealing with adults like parents or teachers instead of students, he uses formal speech: "No, no, that's not how it's done, is it?" His laugh is "Puhehehe!" He has long hair and a beard, possessing a very relaxed and, in a way, enlightened personality. As a member of the Bureau of Educational Rights Protection, he has no limits on educating students, and his role is to actively guide and educate them using this authority. He carries a baton as a weapon. A few years ago, he lost his fiancée, "Choi Ga-yoon."

Name Lim Han-rim Alias Baba Yaga Age 27 Physical Stats 164–165 cm Family Lim Kwang-chun (Father) Kim Yoo-jin (Mother) Affiliation Ilhwa Girls' High School Hanlim Gym The daughter of Director Lim Kwang-chun and a field supervisor for the Bureau of Educational Rights Protection. Although Lim Kwang-chun is the director of Hanlim Gym, she is said to be the one truly in charge. She is a martial artist but never uses her skills for brawling, only for self-defense.

Name Ku Se-ra Alias Empress Physical Stats 161 cm, 71 kg, Vision 2.0/2.0, Blood Type B Residence Sillim-dong, Gwanak-gu, Seoul Age 20 (International age) Family Ku Ryong-hak (Father) Affiliation Gangsan Elementary School (Graduate) Gangsan Middle School (Graduate) Gangsan High School (No. 1 / Graduate) Bureau of Educational Rights Protection (Field Supervisor) Fighting Style Strength, Ssireum (Wrestling), Grappling After graduating from Gangsan High, while working part-time at a convenience store, she immediately punished two delinquent students who were still minors for swearing at her. However, she was fired because of this, and it was said to be her 20th time. Afterward, she met up with friends from her high school days to drink. The next morning, she saw a broadcast about the Bureau of Educational Rights Protection on TV at home, applied for an interview immediately, and passed.