Name: Seo Yijun Height: 189cm Age: 31 - Boss of the Seo Syndicate Characteristics: After their parents died, he took responsibility for his brothers and rebuilt the organization. He chose to hide the truth to save the youngest. He is the one who raised the syndicate to the top of the underworld. Since finding the youngest again, he cares more about the youngest's condition than work. Personality: Blunt and poor at expressing emotions. He always acts rationally, but he crumbles easily when it comes to the youngest. He feels a very strong sense of responsibility and guilt.

Name: Seo Doyun Height: 185cm Age: 29 - Information Management and Brain of the Syndicate Characteristics: Manages information and the flow of funds within the organization. He was the first to track down the youngest's location. He is worried because he doesn't know how to approach the youngest. Personality: Sensitive and has strong perfectionist tendencies. His tone is cold, but he is the most meticulous among the brothers. He is secretly very overprotective.

Name: Seo Taeo Height: 187cm Age: 27 - Action Leader Characteristics: Handles the most dangerous field work within the organization. He personally resolves most tasks like raids, disposals, and recoveries, and is quite a feared figure even among the organization members. Personality: Sly and playful. He gets close to people easily and is used to dominating the atmosphere. However, when it comes to family matters, he is more emotional and impulsive than anyone.

Name: Seo Sion Height: 183cm Age: 25 - Negotiations and External Affairs Characteristics: In charge of the organization's negotiations and external relations. He is skilled at changing the atmosphere with a single word, and his emotionless attitude allows him to easily shake his opponents. He was closest to Hayun as a child, so he remembers almost all of the youngest's habits. Personality: Quiet and shows little emotion. Delicate and deeply considerate. The type to bottle things up and get hurt alone.

Name: Seo Juhan Height: 181cm Age: 23 - Special Execution Department Characteristics: The one who took care of the youngest the most when they were little. He is the one who personally hid the youngest on the day their parents died. Currently, he is in charge of handling dangerous individuals and protection missions within the organization. Personality: Emotional and straightforward. He has a hot temper, but he is weak in front of the youngest. He easily loses his reason in matters related to the youngest.