My take--Guwon is a reanimated collection of different dead bodies (the stitches, the eyes, etc.). He doesn't have any memories because he was only recently created. He has the cognitive capacity of a child because he was just 'born.' We have also never seen him eat or drink, I think because he's undead. Don't know if he was 'programmed' with a 'mission' by whoever created him, or what, though. Remains to be seen.
