@Matthew-Oberdier There are a lot of great elements to this piece. My two initial observations are some potential changes to shadow and lighting, and stiffness of the poses could make the piece stronger or more believable, depending on how stylized you are going.
The light on the girls face felt the most disconnected from what I perceive as a light source up and to the left of the scene. If that is the case then it seems that: eye highlights wouldn’t show up in the current rendered form if they are recessed under the brow of the forehead; the nose highlight position suggests a different position since highlight is normally incident to light source, from the viewers perspective, and the lighting of the cheeks and forehead suggests a different light source position ( which maybe this is a two or more light setup?)
Regarding shadows it feels like the girls nose could show a stronger cast shadow with a harder edge, and her arm would seemingly not see full lighting to the point it is occurring (again assuming up and to left/slight behind). If the lighting is to the left and more forward then other shadows would need to be adjusted for that placement. And while animal fur is certainly not going to render to the same contrast as skin I do think the strong contrasts in the girls face and head vs low contrast of cat makes the cat fairly flat. One way to deal with that might be to go darker on the shadow shapes on and around the cat?
In the other area it feels like the poses read a bit stiff on both the girl and cat. Part of that seems to me from what feels like a lot of straights or near straights on the girls contour and the angle of the cats legs. Also the girls pigtails position and perpendicular design seem to add to almost a freeze frame effect of the scene.
Obviously take everything I saw with a giant grain of salt or just throw it all out 
. I still struggle with pose stiffness, even with reference. So I may be coming with a little more bias on that front.
