Perri Grey is a character appearing in Teenage Mutant Ninja Turtles Adventures Special issue 11. She is an intern at Mergenterprises, a laboratory that April investigates. Grey's boss, Dr. Koss, forbids her from giving April a tour of the facilities, but April sneaks back in when she sees one of Shredder's henchmen delivering toxic waste. April bumps into Perri (literally) once inside the facility, and the two learn that Koss is dealing with the Grem, a vile alien species.