
Are they perhaps father and daughter? Since I could not understand Korean, I could only discern things based on pictures. Both have red eyes and he keeps teasing her like teasing a kid but would that king tease just any kid? And that was not mentioned in the novel she read since she herself is confuse about it....

nah i don't think so? he never slept or fell in love with anyone bc of his illness and bc it seems unlikely that he's her biology father (plus his age) but maybe he wants to be her adoptive father since he treats her like that and I'm sure the author wouldn't mention his and the saintess' resemblance to her: eye and hair color so maybe when he falls for the saintess, he'll adopt her and their kid since she has a huge resemblance but then again, the emperor js pretty young..
i've read up to like chapter 19, it's really good but.. all I can say is that the relationship between her and the emperor is so confusing to me so far..