E-123 Omega (first voiced by Jon St. John, then Jeff Kramer, Maddie Blaustein, and Vic Mignogna, now Aaron LaPlante) is a robot from Sonic the Hedgehog. He is an ally of Shadow and Rouge. He was created by Dr. Eggman, but betrayed him and now is out to destroy him out of revenge.
- He is one of Eggman's E-series robots and the last of the E-Series.
- He is a member of Team Dark and has all the firepower he has