FitzGibbon was a UNSC shipboard Artificial intelligence of the UNSC Prophecy during the Harvest Campaign. After the ship was heavily damaged, the crew was forced to abandon ship in lifepods. Half of the pods that were jettisoned were exposed to a radiation pulse from the ship's engine, exposing the remaining crew to large amounts of radiation, causing most of them to die painful deaths aboard the UNSC Spirit of Fire. This same radiation was reported to have affected the AI, as Serina reports that it "may act peculiar." When Sergeant Forge was sent to the Prophecy to recover survivors, he was redirected by Serina to purge the NAV database of the ship. He was initially prevented from doing so by FitzGibbon due to his "unprofessional record," but after Forge told him he was breaking the Cole