[She'd rather be called a vigilante too. Sometimes she just says she's an assassin even though that paints the wrong picture. Freedom fighter might be the most accurate from her situation.]

Gotham sounds familiar. [From her days in the last multidimensional trap. It's where Artemis Crock and Terry McGinnis were from, but that doesn't come to mind.]

Lots of people in the Fleet have powers. I'm not sure they're all heroing with them, but you'll run into that a lot.