The pilot of the AC, Nine-Ball, he has been the top-ranked Raven in the Arena since its inception. Not much is known about this figure, as few Ravens are willing to challenge him and he rarely accepts missions. One fact though remains undisputed - he is a force to be reckoned with and displays few, if any, weaknesses. Serving as the main antagonist of Armored Core: Master of Arena, it was he who killed The Raven's family and as a result of this, the Raven joined the Ravens' Nest in order to take his revenge.