I expect that she will turn to evil, either in association with Xykon, Nale or simply declare war on everybody. That part I'm not bothered about.
However, whatever she does after another 400 strips or so she will, in the climactic battle, turn back to good and redeem herself in a way which turns the tide.
She will then humbly confess her sins and beg forgiveness, while at the same time confessing her love for Roy.
Belkar will then kill her, either accidentally as an unintended consequence of a chain of freak events set off by a random act of violence or selfishness he committed 50 frames earlier, or because he doesn't know she's turned back, or just because he's Belkar.
Her clothes turn back to blue as she dies.
Done.