This is just a theory based on this manhwa so far, but since Jin-Woo was showed to have two separate hearts, and the architect has 2 sides to his face, it could symbolise that architect in reality is just a stored away memories of Jin-Woo before he come to his senses as a reawaken hunter. I know that this is extremely stretched theory as the father of Jin-Woo and various other factors do not fit much to this. Either way, I should shut up now and wait till next chapters to find out!