Nice concept, and your modelling is pretty good too. What sort of person is this character meant to be? Are they just a normal girl from the future? The reason I ask is because it would help people think up ideas for the robot if they knew what sort of things the robot would be doing e.g if it would be a futuristic pet robot, like a doggy-bot type thing, or does she have a specific job or function and have the robot as a tool, perhaps a bodyguard of some sort.
As for your screen problem, if you havent already taken it back, your could try this: I had screen decolourisation problems, but I solved them by pressing a little button on my monitor’s control panel, that says ‘degauss’. It seems to flush the screen, and solved my decolourisation problems instantly.