E-107 Theta

E-107 Theta - known as E-107 Eta after the Super Genesis Wave - is a fictional character in the Sonic the Hedgehog comic book series and spin-offs. It is an E-100 Series robot.

History (Pre-Super Genesis Wave)
E-107 was tracked down by Robotropolis' underground facilities by fellow E-100 series robot E-102 Gamma, but was lost due to the hazardous environment, causing Gamma to believe that Theta had been destroyed, though this was not the case.

History (Post-Super Genesis Wave)
After the Super Genesis Wave swept over Mobius and changed the history of the world, Theta's name changed to Eta, and he took his place as the leader of an elite Badnik unit. Eta and his unit attacked the university on Eggman's orders, kidnapping Professor Dillon Pickle and Dr. Chuck the Hedgehog, as well as all of their research, leaving the university in ruins.

Light Mobius
E-107 Theta was sealed inside the Catacombs of Castle Mobius along with former king Shadow the Hedgehog, Tikhaos and the Anarchy Beryl Bomb. Little is known about Theta except that it must have been extremely dangerous as only the greatest threats to Mobius that had to be quarantined were kept in the Catacombs. (SU: #7)

Trivia

 * The solicitation for Sonic the Hedgehog #258 stated that Sonic would confront Theta and an army of Badniks when attempting to retrieve the Egg Train's cargo. Though it has been stated by Jon Gray that this solicitation is wrong and that Theta will not appear for the moment. Ian Flynn later expanded on this, stating that Archie did not plan on using anything associated with Light Mobius, and as such E-106 Eta would take over Theta's role, though there was a possibility that Theta may appear in the future. In the end it was altered so that E-107 Theta's name was changed to E-107 Eta.