@RUD3DUD3
My theory is that she is ryu's mother and gave him a certain name but whoever raised him changed it to ryu garim. I believe its most likely the current king that "raised" him, not out of love but more as a hostage to keep his real father in check.
Earlier chapters showed signs that Mook Bum and the king are somehow related and Mook Bum had some shot at being king hence why he keeps asking the mc if he wants to be king.
Hopefully the author doesnt do like author of "Narakarana" and goes on a never ending hiatus just when the plot gets good.