Hi guys and gals

I have just started with this cartoon heroine called Yoko Tsuno , she is pretty much world famous in Europe
I and a friend want to try to model her and the F16-like plane she flies in an adventure of her.( episode 15)
She is an Japanese girl in her 20s.

I have started modeling her already, I dont think the body will be a problem. I have modeled various women before. The problem is the face.In my second attempt now and my model still doesn't look like her.
I could use some pointers on how to improve the likelyness between the model and the drawings.

ref pics of Yoko's face

The front

Side view

Any help is welcome