Known as 'Madam Eunseol,' she is a master of mediation who resolves issues through dialogue rather than scolding her husband. She is 32 years old and 9 weeks pregnant with their son. She is deeply moved by her husband's devotion to protecting her. Despite living in a large mansion, she leads a frugal life. She is close with the Vice President and expresses deep gratitude to them for covering her shifts on Mondays, Wednesdays, and Fridays. After living alone since her independence, she took Yeoljin in and chose him as her future husband.

Eunseol's mother, Yeoljin's mother-in-law, and Somin's maternal grandmother. She has an extraordinary love for her family but is somewhat timid. She is a kind person who, upon meeting her son-in-law, comforted him instead of being disappointed by his lack of parents. At 57, she is remarkably young-looking for a grandmother, with almost no wrinkles.

The daughter of Eunseol and Yeoljin. She has a kind personality and, unlike her maternal grandmother, is quite fearless. Despite her young age, she is smart and knows her father's true identity. Though only 5 years old, she reads the room well, and while she occasionally interrupts, she always takes her parents' side.

A kind-hearted and humble man who steps up for his family and never puts his own choices first. He possesses a strong spirit of sacrifice, willing to give up anything for the sake of his family.

Yeoljin's biological brother Sejin and their parents, who are currently impoverished. They are struggling because no one in the industry will hire them. One day, they track down Yeoljin, but they are filled with regret when he refuses to even let them into his house.