Man, that's extremely disturbing, I'm tempted to look it up but I damn well know I'm going to be sickened by seeing it on real people.
Voja has a longer lock of hair, similar to the Kiruma family. I wonder if it will have any bearing in the upcoming chapters. I don't think he's the Leader in disguise since he'd have a delayed reaction to being called Voja, but I could be wrong about that.