Wow. That first pic really emphasizes just how enormous her head is...
Overall, this is sporadically decent work. Not sure I like the wet-t-shirt look. Although I can respect the skill that went into the effort, I don't think you've quite nailed it. The skull-and-crossbones is a bit half-hearted and the use of colours is poor - no good contrasts anywhere, which is a shame. On the other hand, the NMM is pretty tight (could do with sharper top lighting and maybe some tonal shift) and the attention to detail is good, specially on the pistols and boot buckles. The skin tones, too, are great, but let down by a less-than-perfect finish on her left eye, which appears to be from a different species to her right eye.