Ruler: Master of the Mask: Cast Rate: –☹️ Very Bad🙁 Bad😐 Average🙂 Good😃 Excellent🤩 Super! ★ Save Rating✔ Rating Saved! Notify me: –about new episodeabout new seasonabout end of season Subscribe✔ Subscription Saved! Ruler: Master of the Mask Drama, History 5/10/17 – 7/13/17 Korea, Republic of http://www.imbc.com/broad/tv/drama/gunju/index.html GeneralEpisodesTranslationsCastCharactersGallery Cast See full cast → Kim Myung Soo as Commoner Lee Sun Yoo Seung Ho as Crown Prince Sado Lee Sun Yoon So Hee as Kim Hwa Goon Kim So Hyun as Lee Ga Eun Heo Joon Ho as Dae Mok Park Chul Min as Woo Bo