E-116 Rho is a character who appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It was the seventeenth unit in the E-100 Series line, created by Dr. Ivo "Eggman" Robotnik.
E-116 Rho was created sometime between 3236 and 3237, possibly during or after Dr. Eggman's campaign on harnessing the power of Chaos. Apparently, it was found by E-102 Gamma upon his return to Yurashia at the ocean shores. Rho was then destroyed.