He’s determined inspector from the bureau. He’s a highly trained and strong. A former military operative turned warden, he enforces discipline on abusive students and teachers using a tough-love philosophy called "true education". And Choi Gangseok’s son in-law

She’s a dedicated member. She has a striking dual nature. In everyday life, she appears composed, disciplined, and professional, but when confronted with injustice, she transforms into a relentless and fearless force determined to set things right. She’s very loud and eccentric

He’s a key operative within the bureau and a brilliant yet delightfully nerdy officer. He serves as the agency's tech-savvy lifeline.

He’s the Minister of Education who established the Educational Rights Protection Bureau and Na Hwajin’s father in-law