Korean singer and actress known more commonly by the name Uee. She joined the group After School in 2009 and has appeared on TV shows like Ojakgyo Family and Golden Rainbow.
She initially started singing with Five Girls in 2007, although the group was short-lived. She made her TV debut in 2009 on the show Queen Seondeok.
She's appeared on survival-based variety shows like Barefooted Friends and Law of the Jungle. She was a high-level swimmer in high school.
She grew up with an older sister named Kim Yu-na. Her father is known in South Korea for being a professional baseball coach.
She and Raina have performed together as members of After School.