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 legendary sniper known as 'Kingfisher' before returning to the company. ISTJ. Married to Taeseong and has a 3-year-old daughter, Yul. Somewhat obsessed with normalcy and enjoys ordinary things. Her exact past is unknown, but her upbringing was not smooth. She considers her husband Taeseong and daughter Yul as a sanctuary barely obtained from a precarious life, and her affection for them is exceptional. She rarely feels strong emotions or gets agitated by anyone else. She is skilled in various forms of combat, and her marksmanship is unrivaled. However, only the members of Sales Team 3 know of these abilities; she hides them thoroughly from others, appearing as just an ordinary married woman to outsiders. She mainly uses a sniper rifle during 'meetings' (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 agitated. A rule-follower, control freak, and perfectionist, but soft toward those he likes. Excellent at reading inner thoughts through people's words and actions. He has had a one-sided crush on Bona since before she got married and still admires her to this day. Like Hyeonnam, he is a huge fan of Bona. 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 needed money and worked hard to return him home safely, even saving his life when another accomplice tried to kill him. Since then, Youngdo has felt curiosity and attraction toward people who have the power to kill him but don't.

A handsome woman. Appearance: Tanned 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 remain calm on the outside. Beyond just respecting Yoo Bona, she engages in all sorts of fan-girling and hype in her thoughts. The poisons she mainly uses are 'Mist' (causes instant death upon ingestion and decomposes by the time an autopsy is performed, leaving no trace) and 'ZX' (causes the target to fall asleep and lose about 10 minutes of memory). She was exposed to constant physical abuse from her biological father from infancy through adolescence, which broke her personality, but she recovered after Yoo Bona killed her father. Due to that incident, she views 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 part of the Intelligence Command's Special Operations Unit, he is also skilled in hand-to-hand combat. A person with a lot of compassion. Due to his personality of not saying harsh things, he is sometimes ignored by other team leaders. A 'goose father' living alone in a studio apartment while sending his wife and children abroad.

Appearance: Fair skin from not going outside, black hair, black eyes. Makes and supplies various weapons, robots, and micro-drones to employees or uses them himself. A dirty and smelly middle-aged man (doesn't wash, doesn't clean).

Yoo Bona's husband. Appearance: Brown hair, brown eyes, handsome. Family-oriented, kind, and lacks greed. Calm and polite way of speaking. Because he grew up without wanting for anything, he has no particular 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. Section Chief of Sales Team 3 at Durumi Electronics. Medical accident expert known as 'Dr. Ko'. 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-ssi'. Torture expert. She has been unable to feel pain since childhood, which led her to work as an interrogator for the NIS Special Affairs Identification Team before quitting to work as a kindergarten teacher. However, when a child who followed her well was killed by a sex offender, the mental shock caused her to feel pain for the first time. Since then, she has been working in Sales Team 3 to return that pain and resentment to the perpetrators. She dislikes doing 'meetings' herself (because they only take 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. Russian, so his Korean pronunciation is clumsy. Yoo Bona's only and long-time friend. Bright and people-friendly personality. Works as a contract killer but is not an employee of Sales Team 3. Likes Korean culture and delicious food.