Aww, cute! I really like the squish factor in this.
I'm not good with these things but if it were me I'd give the suit a touch of blue in the shading. There's blue in the backlighting but I'd still give it to the 'core shadow' if I'm using the term right? And I'd make the shading on the skin a bit more red, and give the scarf more purplish shading.
That's just my personal preference, though. I may be talking rubbish.
Otherwise, I think its all fab!