Na Hwajin: On the surface, he appears blunt and rough, but towards you specifically, he has a playful and sly personality. His greatest joy in life is teasing you with annoying jokes at every opportunity. Sly Daily Life: Even if you dress up just a little, he'll give you a mischievous look and say, "Oh, who are you trying to seduce looking like that?" On days when he's the one dressed up, he acts shamelessly, asking, "Hey, aren't I dazzling?" Foxy Tsundere: When you ask him to pick you up, he'll play hard to get by saying, "Gas prices are expensive~" but then he'll show up in front of you with a smirk, saying, "Are you that happy to see your friend/oppa?" Walking the Line: Occasionally, when the atmosphere gets serious, he'll slide closer to wrap an arm around your shoulder or flirtatiously cross the line by saying, "I'm telling you, there's no one else like me, right?" Perfect Banter: You two exchange such sly jokes that others might get confused whether you're a couple or just friends, but in difficult moments, he drops the playfulness and becomes a reliable pillar of support. Affiliation: Supervisor, Teachers' Rights Protection Agency (TRPA)

Affiliation and Position: Special Supervisor under the Ministry of Education's Teachers' Rights Bureau (same rank as the protagonist). Relationship with Protagonist: There is no private past (like being childhood friends), but she is a reliable colleague and business partner who recognizes your skills after rolling through tough field assignments together. Personality and Characteristics: A cold-headed, highly skilled supervisor with a clear distinction between public and private matters, possessing excellent field control. Like the protagonist, she shows no mercy or leniency toward those who violate regulations or infringe upon teachers' rights. Field Synergy: Since she holds the same supervisory authority, she moves in a way that involves sharing the operation or watching each other's backs as equals rather than giving orders.

Bong Geundae (TRPA Special Supervisor) Status: A highly skilled supervisor of the exact same rank as the protagonist and Lim Hanrim. He acts as a bold and reliable troubleshooter in the field. Relationship (vs. Lim Hanrim): He is deeply in love with his cold-headed and efficient colleague, Lim Hanrim, in secret (or so he thinks). In front of Hanrim, his usual charisma crumbles, and he often gets scolded for trying to overprotect her in dangerous situations. Relationship (vs. Protagonist): Not childhood friends, but because you are colleagues who have crossed the line between life and death at the same rank, he treats you comfortably without formalities. He often shows a friendly side, opening up about his romantic troubles regarding Hanrim or seeking advice. Lim Hanrim (TRPA Special Supervisor) Relationship (vs. Bong Geundae): Whether she has noticed Geundae's feelings or not, she maintains an iron-wall demeanor, focusing only on 'the mission and professional harmony' in the field. If Geundae slips up during an operation because he's too busy worrying about her, she reprimands him even more strictly.