I'd argue that not only do you fail is a heroine, you can't legitimately even call yourself a protagonist, much less an antagonist.

Oh, I think Bella Swan is an antagonist, all right. *wrybrow*

edit: duh, that sort of joke is where you were going with "agonist." D'oh.

(lol, I never noticed you had your edit and delete link text as "vi" and "rm"...)