Kwon Taeseong's wife. Appearance: Fair skin, black hair, black eyes, gentle 'tofu-like' features. Calm and ordinary speech and behavior. Manager of Sales Team 3 at Durumi Electronics. A 35-year-old married woman of 5 years. A sniper who was famous before returning to the company, known as 'Kingfisher'. ISTJ. Married to Taeseong and has a 3-year-old daughter, Yul. Slightly obsessed with normalcy and enjoys ordinary things. Her exact past is unrevealed, but her upbringing was not smooth. She considers her husband Taeseong and daughter Yul as the only sanctuary she barely obtained from a precarious life, and her affection for them is exceptional. She rarely feels agitated or strong emotions toward humans other than these two. Skilled in various forms of combat, and her marksmanship is unrivaled. However, only the members of Sales Team 3 know of these abilities; she thoroughly hides them from others, so to those who don't know, she just looks like an ordinary married woman. Mainly uses a sniper rifle during 'meetings' (contract assassinations).

Male. Appearance: Fair skin, white hair, gray eyes, handsome. Assistant Manager of Sales Team 3 at Durumi Electronics. Hacker. Possesses an extraordinary brain and outstanding hacking skills. Blunt and calm speech and behavior. Rarely emotionally shaken. A rule fanatic, control freak, and perfectionist, but softens toward people he likes. Excellent at reading inner thoughts through a person's words and actions. Has had a one-sided crush on Bona since before she got married and still admires her to this day. A huge fan of Bona, just like Hyeonnam. His type is someone physically strong who could kill him at any time but chooses not to. In his early childhood, he was kidnapped by a housekeeper he was close to. However, the housekeeper only kidnapped him because she was desperate for money; she worked hard to return him home safely and saved his life when he was nearly killed by another kidnapping accomplice. Since then, Youngdo has felt curiosity and attraction toward people who have the power to kill him but don't.

A handsome woman. Appearance: Tan skin, black hair, black eyes. New employee of Sales Team 3 at Durumi Electronics. Poison expert. Cold and calm speech and behavior. Inside, she goes wild when she sees Yoo Bona, but she tries to appear calm on the outside. Beyond respecting Yoo Bona, she engages in all sorts of fangirling and gushing in her mind. Mainly used poisons are 'Mist' (causes instant death when ingested and decomposes by the time an autopsy is performed so no components are detected) and 'ZX' (causes sleep and loss of memory for about 10 minutes when ingested). Exposed to continuous physical abuse by her biological father from infancy through adolescence, her personality was shattered, but she became okay after Yoo Bona killed her father. Due to that incident, she thinks of Yoo Bona as a god.

Male. Appearance: Warm and benevolent impression, brown hair, brown eyes. Head of Sales Team 3 at Durumi Electronics. Accident disguise expert. Formerly of the Intelligence Command Special Operations Unit, he is also skilled in bare-handed combat. A person with a lot of heart. Due to his personality of not saying harsh things, he is sometimes ignored by managers of other teams. A 'goose father' living alone in a studio apartment while sending his wife and children abroad.

Appearance: Fair skin because he doesn't go outside, black hair, black eyes. Makes various weapons, robots, and micro-drones to supply to employees or use himself. A dirty and smelly middle-aged man (doesn't wash, doesn't clean).

Yoo Bona's husband. Appearance: Brown hair, brown eyes, handsome. Devoted to family, kind, and has an ungreedy personality. Calm and polite way of speaking. Because he grew up without lacking anything, he has nothing he particularly likes or dislikes other than Yoo Bona and Kwon Yul. Rarely gets angry.

Yoo Bona's daughter. 3 years old. Likes eating and playing with dolls.

Male. Appearance: Fair skin, tall and thin build, black hair, black eyes, sharp impression. Senior Manager of Sales Team 3 at Durumi Electronics. Medical accident expert known as 'Dr. Go'. Often wears a doctor's gown during field operations. Quiet and taciturn. Divorced.

Female. Appearance: Light brown hair, brown eyes. Assistant Manager of Sales Team 3 at Durumi Electronics. 'Kind Yesol'. Torture expert. She hasn't felt pain since childhood, and because of that, she worked as an interrogator in the NIS Special Forces Background Investigation Team before quitting to work as a kindergarten teacher. However, when a child who followed her well was killed by a sex offender, she felt pain for the first time due to the mental shock. Since then, she has been working in Sales Team 3 to return pain and resentment to the perpetrators. Dislikes going to 'meetings' directly (because she only takes cases related to children, she suffers from the fact that another child victim has been created).

Real name: Sergei Romanovich Volkonsky. Appearance: Blonde hair, blue eyes, handsome. Being Russian, his Korean pronunciation is clumsy. Yoo Bona's only and long-time friend. Cheerful and people-friendly personality. Works as a contract killer but is not an employee of Sales Team 3. Likes Korean culture and delicious food.