Aww, thank you! Those are actually... very accurate adjectives to describe him... :O
My character's a guy if you couldn't tell, and I've never seen The Walking Dead, but I totally see that comparison.
Well, he looks vert androgynous and very young (I would give him between 12-14, just beginning to turn into a young man). Based on the physiognomy alone he could be either a young man or a young woman with a potentially low voice.
In any case the art is sensitive and I like it. It really tells a story.
Oh, I just noticed his left eye is somewhat significantly smaller than his right. May or may not be worth a quick adjustment.