is she actually going to be skiing switch?
I know I might get a hater response, but if she's not actually going to be using them in the park, I'd suggest getting her a pair of good single tip skis.  If she's an beginner/intermediate and you really want to get her into carving, dont put her on a pair of twins.
I bought my girlfriend a pair of skis for christmas and did a fair bit of research.  I ended up buying her a pair of K2 Mystery Luv's with Look Nova 10 lifter bindings.
The lifters will be good for turn initiation, and will give her more confidence while learning to carve.
Once she's a capable skier, then throw her on some twins and tell her to hit some rails.