I'd just like to point out that just because you -can- keep female bettas in groups with other female bettas doesn't mean you really should, or that you need to. Bettas are perfectly happy on their own or in a community setting. If you wanted to start a small sorrority in your tank then you would need to do some heavy reading and planning. Your tank needs to be full of hiding places and ways of breaking their line of site, they all need to be quarintined before being added, and they would need some close monitoring to make sure no one gets sick or seriously hurt. If you want to keep her then I wouldn't get any more bettas to put in with her.