Thanks guys, all interesting points.
Ive already planned and written over half of it so i dont think ill be making any of these extremely drastic changes that youve suggested. But they're all still good to have on the back for any re-writes that may (will) come a little later.
I think the main thing i have to concentrate on is to capitlize as much as possible on the idea that she has 'insider' knowledge on the space station, power that she can (and does) use to her advantage. Useing this to foil the bad guys as much as possible