I would've said the Kate Beckinsale, Rhona Mitra type like Dante said but those chicks kinda lose me. I don't find them to be convincing like Summer Glau or Milla Jovovich. Sorry dante

I meant more the action fem type in animes. Stereotypical part, not main character roles (Fujiko, Mai Shiranui etc..), and Gina not necessarily being the voice and model for one, BUT if there's any live person James Cameron should be modeling after or inspired by for his upcoming "Battle Angel" (think "A.I" meets The Fifth Element) it's Gina.
edit* add
maybe a better example of type for her than anime would be any of the Bond movie girls or the old B-movie baddasses. Any further would be main character, expectation & content necessary types like: Glau, Jovovich, Carrie-Ann Moss (Matrix)