South Korean actress Yoon So-Yi. Don't be fooled by that innocent face and sweet smile, Yoon So-Yi is a kick-ass action star! She was in the 2005 martial arts epic Shadowless Sword, with her character as a beautiful young swords woman: While Shadowless Sword was set in ancient China, Yoon was in another martial arts film Arahan, which was set in modern South Korea. Arahan was based on a