I personally don’t think (YSY) can pull it off because he’s too ‘‘goofy’’ and won’t match the role just like Na In Woo with that ‘‘pouchy’’ mouth, and weird frowny face. At one point during battle they need to get serious in the fighting sword role so YSY doesn’t look like he can handle the sword. We have seen the guy from Empress Ki [JCW] look silly, and get the warrior role down to the ‘‘T’’
Another thing, ON Dal and the girl do have a long romantic story, and this guy (YSY) is no romantic material. Of course, that’s my personal opinion from all the roles I’ve seen him so far. Contrary to JCW that can make great romantic scenes with all of his FL in dramas. I saw him in a Chinese drama and he was fantastic there too (don’t ask me the title bc I’m bad with asian titles and names).