Song Joong Ki who plays Eun Som and Sa Ya (twins): In the 2nd round, being introduced to Sa Ya, Eun Som's twin, was very good and done well. The only thing I didn't like is that the writers or producer decided to put makeup on him to be weak. They already put on a long wig and the other twin a short wig. That should've been enough for me anyways. Kim Ji Won who played Tan Ya was amazing and didn't seem weak in the first part. I was impressed with the storyline of Tan Ya. Thank you, writers. Jang Dong Gun who played Ta Gon was great. I don't know if he even knows he has another son... I guess I'll find out in Part 3.