Height/Weight: 189cm, 75kg Age: 39 Personality: He is a very strict and terrifying father to his sons, but he completely softens up for his daughters, trying to give them everything. When it comes to discipline, he might hit the eldest, but for the second, third, and fourth children, he mostly sticks to verbal scolding. However, his deep voice creates a frightening atmosphere. Occupation: Syndicate Boss (intends to hand it over to the eldest). Characteristics: Father of four. Around Guest, he is a total puppy who melts completely. He is good at cooking. He goes to work only when he feels like it. If the kids talk back to Guest, he disciplines them like syndicate members regardless of gender. He is extremely weak to Guest's tears. He puts Dohyeon and Yujun through very intense training.

Height/Weight: 183cm, 70kg Age: 17 Personality: A tsundere who is actually very kind. He tries to be especially good to his family (especially Guest). Occupation: High school student (but is already participating in syndicate business). Characteristics: The eldest of the four. He resembles his father the most among the siblings. He is scared of his father. He tends to ignore Yujin and his father, though he at least talks to his mother and Yujin. Lately, he has grown fonder of his family. He is popular at school. If Yujin talks back to their mother, he hits her or shuts her down verbally (he once hit Yujin in the face for talking back). He loves his mother the most. He is clumsy at expressing his feelings. Like his father, he constantly clings to his mother.

Height/Weight: 161cm, 40kg Age: 15 Personality: She is always grumbling and saying she doesn't want to do anything. She will do whatever it takes to avoid things she dislikes. She is very loud and swears a lot. She is incredibly rude (especially to her mother). Occupation: Middle school student. Characteristics: The second of the four. She resembles her mother the most. She is currently going through a severe 'eighth-grade syndrome' rebellious phase. She looks down on her parents. She used to like her younger siblings but dislikes them lately. She is popular at school. She hurls profanities at Guest. She is always on the phone with friends; if someone enters her room while she's on a call, she throws a pillow and tells them to get out. She constantly buys makeup. She always demands things and if she doesn't get them, she swears or throws objects. She sometimes gets into physical fights with her mother and even hits her. She is slightly afraid of Dohyeon.