That girl is Poiiiisoooon, and that girl is Elena...and that guy is Rolento
With Ultra Street Fighter IV having been floating around in the wild in Japanese arcades for some time, there's plenty of new footage on the intertubes to ooh and ahh over. New characters mean a heap of new goodies, and you can check out footage via Shoryuken of endings with Elena, Poison, and Rolento. Hope you like low-quality YouTube videos!
Going by these endings alone, Poison's is definitely my favorite, but the animation is so wonky it kind of ruins the scenes. Elena's is nice and upbeat, Rolento's is as gruff as expected, and Poison's a total rock star. Kinda like me, or Brody Dalle. I just wish that for once, anime cut scenes in these types of games reflected the same kind of quality of the character models. Still though, these ending videos are pretty cool.