E-115 Pi is a character mentioned in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It was the sixteenth unit in the E-100 Series line, created by Dr. Ivo "Eggman" Robotnik.
E-115 Pi was created sometime between 3236 and 3237, possibly during or after Dr. Eggman's campaign on harnessing the power of Chaos. Apparently, Pi was caught by E-102 Gamma at the Great Crater in Downunda. Gamma was successful at destroying Pi.