It's the skin tone. The red outfit plus strong lighting is making her skin look more yellowish. Try less light? Or make it redder??
The slightly robotic pose, the blank expression, and the stare-forward-into-nowhere eyes complete the office-barbie look. But then that's prototype shots for you.
She's looking a tad cross-eyed too. Are you using point-at on the eyeballs? That'll do that if the object isn't far enough away. I usually stick with eyes-side-to-side and eyes-up-down. Sometimes its just a sloppy model. Leah's got a bad case of cross eyed by default I never managed to properly fix.