It's Nitroplus. Come on, Austin even specifically mentioned that in his rant!Games Austin will fight for:
Invisible Inc.
Nitro Plus Blasterz Heroines Infinite Duel
After that diatribe, I feel like Austin should be invited out to a fighting game event like CEOtaku or Animevo -- then he could have all of the anime fighters he could possibly want (yes, including Nitroplus Blasterz).