The Quintesson Prosecutor is supported by a propulsion column with a light-up feature. The Prosecutor is distinguished by a curving, elongated cranial housing and a fairly vicious-looking countenance. The Prosecutor is equipped with side-mounted, squidlike tentacles (although these tentacles are completely useless when a lumbering herd of Dinobots pin you beneath a massive metal door). In Transformers: The Movie, the Prosecutor was the one snidely delivering the orders to the Quintesson Executioner.

Having created Autobots and Decepticons as servitor races, the Quintessons were defeated by their creations, expelled from Cybertron, and forced to colonize the much less grandiose planet of Quintessa. Consequently the Quintessons are now disgruntled, and are forced to entertain themselves with mock trials, petty cruelties, bizarre experimentations and attempted subterfuges.