For a femme I'd say the Cliche of Arcee or Elita-1 or Chromia. Or character's you rarely see such as Moonracer or Firestar or Override.
Oh, right. That was solved a while ago where there was this whole poll and stuff. In short, it was decided that Prowl would be the additional bot and Slipstream would be the additional con.
More episode Synopses added, plus a few titles for you guys to speculate on. I'm open to ideas for episodes.