Question: who is gu hye sun?
Answer: Ku Hye-sun (Korean: 구혜선; born November 9, 1984) is a South Korean actress, singer-songwriter, director and artist. She gained widespread recognition in the television dramas Pure in Heart (2006), The King And I (2007), Boys Over Flowers (2009), Take Care of Us, Captain (2012), Angel Eyes (2014) and Blood (2015).