It may not look like it but in the long run, Zeno is the most powerful amongst the four. But this is just my opinion. :) Anyways, I love them all! I shipped Hak<3Yona.
One more thing. I feel like there is a story behind King IL so there must be really a reason why he was killed, he appears to a weak nice king but Soon Won isn't really after the throne, His love for the country is real.
Woah! I've read this in 2014. I thought it was finished, it ended rushed and no clear ending but then it is updating now. Now, I'm expecting more from this.
what have they done with the story?! They should have stick on the original plot.