Great paint work here!
Good colour choices and nice detail.
I like the red base skin tones ...these work well with the very white teeth. The central eye has come our nicely...and frankly if you got this wrong..it would spoil the whole thing...so Well Done!
Only a couple of points off....a little more shading work on the teeth wouldn't hurt and although the central eye is good..it lacks a little lustre..maybe a gloss finish?? The small eyes could use a little more definition...but this really is quite picky!
He does look fierce though....Owwww!
Overall ---- EXCELLENT ----- BRAVO!!