Sometimes problem with pictures like this is that they look photoshopped even if they are not. But they look like there is suiter glued to front of some random sunset image.

Therefore it is nice if there's some connection between people in front and background. In this case it is that warm red glow in Shadow's fur and also in her shirt. Very small detail but I think in this case it just gives that feeling that there really was setting sun shining behind her.