E-107 Eta

E-107 Theta is an E-100 Series robot.

History
Theta is the eighth E-Series robot created by Dr. Eggman. At some point its brother E-102 Gamma pursued it into the radioactive Robotropolis underground but lost it due to the hazardous environment. Gamma assumed it was destroyed. (ASUB)

Background Information

 * Theta's future self was name-dropped by Queen Sally as one of the various threats quarantined underground in the Castle Mobius catacombs, implying it was too dangerous to be simply destroyed. This was likely connected to its earlier encounter with Gamma in which it was lost underground in a radioactive facility.
 * In the initial solicit released for StH #258, Theta was said to be one of the elite Badniks guarding the Egg Train. Jon Gray clarified on the Bumbleking forums that the solicit was inaccurate, and Ian Flynn later implied that Theta and all other Light Mobius concepts are permanently off-limits for use in the comics.