Nice work, @PandaBrush 
BTW, I would push up the contrasts even more in that case! I see that you want a focus on your character, followed by the mecha on the left-side of the comp, but the background is full of details and the focus could be enhanced. Color and light direction are there to help it already, good work on that!
Here's a quick suggestion, followed by some ideas that could help you further... But maybe that's not what you expect for your image. 
-Details, strong vs. simple : here I've used a lens blur followed by a "Unsharp Mask" on the mech, and on the character. But it could have been done differently.
- Lights: the dark contrast on the back of the character made it pop out; the back-light you added helped a lot: here I've contrasted that side of the comp (with a small vignetting too) to help it even more.
- Now that the contrasts feel okay for me, I've mixed the overall colors a bit with a color balance.
Keep up the good work mate, hope that helps
