The RX-80 was later acquired by a mysterious official named Grave, who wanted a high-performance machine for the special “HADES (Hyper Animosity Detect Estimate System)” based on the EXAM System. With the HADES’ core unit installed in its head, the mobile suit was given the code name “Pale Rider”, derived from the name of the fourth and final horseman of the Four Horsemen of the Apocalypse. The name also has a second meaning: since the HADES forcefully takes control of the mobile suit when activated, with the pilot serving as little more than a biological component, the mobile suit controls the pilot, rather than the other way around. Hence the mobile suit was the “Rider”, rather than the horse.