She is the wife of Jang Se-joon. The eldest daughter of a chaebol family, she was disinherited from the JB Group conglomerate as her father disapproved of a politician as a son-in-law, although she received control of JSS Security. Ambitious and merciless, her corrupt nature is due to the result of her upbringing. She sets her sights on becoming the First Lady and is willing to manipulate An-na and her husband to further her aims. As the series progresses, she begins to develop feelings for Je-ha after he rescues her from an exploding car.