It isn't a Smash-style game, and doesn't have Yotsuba.
It's a weirdly serious fighter, and I'm sad the Ignition update didn't get a US release.
But I was already torn between maining Kuroyukihime or Misaka Mikoto anyways*. I didn't need more options... unless they were awesome options.
*The two had a delightful pre-fight exchange that played with the weight both franchises place on numerical power levels. Suffice to say, Mikoto was a bit concerned about fighting a "level nine".