Retep Niffirg is an evil version of Peter Griffin, regenerated from his severed hand which was chopped off while passing under a bridge with his arm hanging out of the car in "Meg Stinks!". Retep cackles whenever people experience misery and is later seen by Peter from the Megcopter in the process of killing a woman.

He lives in Gohauq and has friends called Erimgauq, Dnalevelc and Eoj.