Femme fatale works. I wouldn't put it past Square to be using obscure references. And yes, it's starting to feel more gritty and less like "Fifi" or a drag queen's name now that I'm writing her and letting her sit in my head.

On the other hand, maybe it wasn't deliberate. Squaresoft named two characters "Irvine" and "Laguna" in the last game I played, which are two towns within a few miles of me. I think somebody on the creative team was throwing darts at a map.