Try making her more sinister. Maybe have her really close to him or somthing, maybe grabbing his collar to bring him closer. I also think the direction of her body is off, it doesnt look like shes is ready to shift her weight should she actually stab, or slash the guy. I like the colors and the texture you go going on so far.
"Astronomy offers an aesthetic indulgence not duplicated in any other field. This is not an academic or hypothetical attraction and should require no apologies, for the beauty to be found in the skies has been universally appreciated for unrecorded centuries."