Yes, she's Tifa. Her outfit doesn't really match the other two, but there aren't that many poses that work, and of course feet are so rarely seen, so I had to go with what fits.
Here is the artist:
https://www.deviantart.com/stormbackstrom
Since AI art isn't copyrightable, does that make what I do here more "artistically legitimate"? Or less? It's kind of a silly question, but why not?