Question: Which child actress began her career in 2006 and also stared in the television series The Emperor: Owner of the Mask?

Related documents: [0]  [DOC] Kim So-hyun (; born June 4, 1999), is a South Korean actress. She began her career as a child actress in 2006 and initially gained public attention for playing a villainous young queen-to-be in "Moon Embracing the Sun" (2012) and a girl who falls into tragedy in "Missing You" (2013). She took on her first leading role in teen drama "" (2015) and since then, has starred in horror comedy "Hey Ghost, Let's Fight" (2016) and historical melodrama "" (2017). [END] 
[1]  [DOC] The Emperor: Owner of the Mask () is a South Korean television series starring Yoo Seung-ho, Kim So-hyun, Kim Myung-soo, Yoon So-hee, Heo Joon-ho and Park Chul-min. It aired on MBC every Wednesday and Thursday at 22:00 (KST) from May 10, 2017 for 40 episodes. [END]  
Answer: Kim So-hyun
Kim So-hyun