Beautiful render.  Although you are going for non-realistic look, some lighting behavioral laws should look natural.  In your scene, the character's skin texture is reflecting too much specular, the arms are getting close to blooming.  That can be corrected by either tweaking any specular nodes present or using tone mapping to prevent the highlights from blowing out.  Also, the prominent gun flashes should be providing some illumination to the background and her face.  At first glance, the scene is acceptable but on closer inspection, I get a nagging feeling that something appears wrong. 

BTW, she missed.  There should be bone fragments exiting the back of the skull, lol.