As someone above me stated certain aspects of the model look really iffy. The hair could probably be smoothed out some. If you are aiming for the high resolution feel, you could add in a few more polygons for the bangs. The lips are a little too full and need to be slightly wider. The nose is pretty spot on, good job there. I always thought Aeris' eyes were slightly more darker blue. The ears ought to be more rounded, they are rather pointy. The cheeks are too inward, her face is a bit more round, and child like.
I don't know if my critiques will help any. It is your model, and is coming together really nicely. I hope my words help more than harm.