And which is just a regular character?

Sideshow Bob, Apu, Otto, Barney, Lenny and Carl, Smithers, Fat Tony, Roger Myers, Wiggum, Ralph, Maude, Rod or Todd, Patty or Selma, Chalmers, Agnes Skinner, Lovejoys, Sideshow Mel, Quimby, Baby Gerald, Gil, Comic Book Guy, Nerdy Teenager, Kent Brockman, any of the Van Houtens, etc, etc, etc……

Any of those could be in the running.