@Varler
Well, his whole purpose is revenge, and he just found one of his main target... so, yeah, showing his face now (or more like his brother's) wouldn't be completely inappropriate.
Also, that's a pretty badass move.
at least the armor he'll get later on can close their eyes.
@varler What's the point of revenge-kill if the one killed doesn't know who killed them and why? The whole reason of getting revenge is seeing the face of despair, guilt, and fear on the faces of those you took revenge on. That's where you get the satisfaction.
@Serenata Funny thing about that is that is almost how they are described to look like in the book. Line from the book 'Yeon-woo saw hazy figures floating in the air. The appearance of a rag doll with three holes cut out in place of their eyes and mouth.'