Kwak Mi-hyang, born on November 17, 1976, is the wife of Kang Jun-sang and mother to Kang Ye-seo and Kang Ye-bin. While she appears to come from a prestigious background as the daughter of a bank president, her true origins reveal a troubled childhood with a drunken butcher father and a hidden past. She worked as an elementary school teacher before becoming a full-time housewife. Only a few, including her husband and mother-in-law, knew her real history until it was inadvertently exposed to the residents of SKY Castle.