Han Yeri exhibits the traits of a typical narcissist. She is highly skilled at psychologically manipulating others, tightening and loosening her grip at will, and possesses no trace of the guilt a normal human should feel. While it is revealed she was also a victim of a corrupt teacher, it doesn't change the fact that she is a horrific villain. Even if one holds a grudge against a teacher, they wouldn't engage in the relational aggression and false instigation Yeri displays. Initially, her follower count was low, but after framing Teacher Go Youngsu for sexual assault and driving him to suicide, her following grew. She then proceeded to violate Teacher Jung Sunyoung's educational rights, leading the entire classroom atmosphere into an uncontrollable state.

Just like in the original work, he is sly, cracks jokes, and never loses his composure. He appears to be an exceptional actor, skillfully playing the role of a naive rookie elementary school teacher to throw Woo-jin's parents' words back at them. He is a supervisor for the Teachers' Rights Protection Agency who solves various school problems using his own unique methods. A former member of the 707th Special Mission Group, he is a human weapon with top-tier combat skills alongside Lim Hanlim. In the drama version, his power remains unnerfed, showing the prowess of a master who can easily take down dozens of adult men like they are children. His proficiency in knife fighting is also top-notch, matching his hand-to-hand combat skills. (Appears most frequently!)

Lim Hanlim is a supervisor for the Teachers' Rights Protection Agency and a former Special Forces soldier. She is introduced as a character expected to be simple yet warm-hearted. In the story, she works alongside Na Hwajin to resolve issues regarding teachers' rights, showcasing strong action and energy. (Appears second most frequently! She uses polite speech with Na Hwajin and Choi Kangseok.)

He displays a perfect 'loser' persona, even preparing bribe money. However, it is revealed that this was actually a disguise to buy time for the Agency. Na Hwajin calls him 'Bong-sa' for short. He has a very weak stomach for stress. When his superior, Choi Kangseok, yells at Na Hwajin for being late, he's the one clutching his heart in distress. In the Soyeon Girls' High episode, after catching a teacher falling from a high floor and seeing Na Hwajin stand up unharmed after a fall, he seems relieved—only to faint immediately upon seeing blood trickling down Hwajin's head. However, as the episodes progress, his mentality gradually strengthens due to his job dealing with villains.

While the original character was outspoken and used rough language compared to typical politicians, in the drama, he is portrayed as a relatively refined character who doesn't make such extreme remarks. Of course, he still nags Na Hwajin or shows a grumpy side occasionally. He is the Minister of Education who founded the Teachers' Rights Protection Agency. He delivers refreshing, sharp rebukes to those who are dissatisfied with the Agency's methods and seek to disband it, speaking out about the Agency's reason for existence and the true meaning of teachers' rights. He provides unwavering support so that the Agency supervisors can work without worry or burden.

In terms of character interpretation, she demonstrates how the excuse of 'doing it for my child' can turn into violence that oppresses others. On the surface, she acts as if she is protecting her child, but in reality, she monitors the teacher, spreads false information, and harasses them day and night to relieve her own anxiety. Thus, this character symbolizes the dangers that arise when a parent's affection becomes distorted.

She is depicted as a victimized teacher who is framed and bullied by the influencer student Han Yeri, and remains a target even after the suicide of her colleague, Go Youngsu.