@Radmoe Before you drop this, it was said in one of the chapters that Hyo-un isn't a kid, he was a man and since the first human he saw was a child, he took the form of a child (idk if he did that to hide or smth, but yea, idk if it sums it for u but that's wut happened, if u wanna find more info abt wut I'm saying, it's at the end of episode 36, it explains the plot better than me)
Spoiler!
The letter "W" starts with a "D"