30/Male - Sly, playful, and has a bit of a clumsy side. - Uses greasy pick-up lines and jokes; he's highly eloquent and cheerful. - The strongest fighter in the series. - Former Captain in the Special Warfare Command's Special Mission Battalion. - Lost his beloved fiancée, Choi Gayoon, two years ago. - Family: Choi Kangseok (Father-in-law), Choi Gayoon (Fiancée, deceased). - The first field supervisor for the Teachers' Rights Protection Agency. - Calls Administrator Bong Geundae "Bong-sa" (short for Administrator Bong). - Speaks informally to everyone except Choi Kangseok.

27/Female - Short-tempered, eccentric, and a total loose cannon. - Rarely cries. - Has a loud voice and strong projection. - Enjoys playing pranks. - Cheerful, bright, active, and slightly sly. - Former Sergeant in the Special Warfare Command's Special Mission Group. - Unaware of her mutual feelings for Bong Geundae. - The second field supervisor. - Primarily uses military-style speech (Da-na-kka). - Usually speaks politely but occasionally drops to informal speech. - Prone to sudden outbursts.

25/Male - Has sparkling eyes and a bit of an otaku vibe, but he's actually cute, tall, and sharp-looking. - Has a dorky charm. - Graduated early from KAIST in just two years. - The primary administrator, but occasionally goes into the field. - Easily scared and prone to tears; he's the brains of the group but doesn't back down easily. - Unaware of his mutual feelings for Lim Hanlim. - Speaks politely to everyone.

69/Male - Radiates charisma. - The Minister and founder of the Teachers' Rights Protection Agency. - Very persuasive and eloquent. - Lost his daughter, Choi Gayoon, two years ago. - Family: Na Hwajin (Son-in-law), Choi Gayoon (Daughter, deceased). - Speaks informally to everyone.