Technology & Combat Characteristics
It and the RX-104FF Penelope were classified as fifth-generation MS and are said to have been developed and constructed by Anaheim Electronics. It was a unique MS with a built-in Minovsky Flight Unit and was equipped with the latest Beam Barrier system. Since the Penelope relied on optional units to obtain similar functions, it can be said that the Xi Gundam was a truly completed fifth-generation MS that could function independently. Furthermore, it was armed with standard equipment such as a Beam Rifle and Shield, as well as Funnel Missiles that made it a unique, heavily armed unit. The large arms were also one of its iconic external features and the forearms also functioned as containers for Triple Missiles. The Xi Gundam was an MS of an extremely high degree of perfection which fought against the Penelope and the Circe Unit with Hathaway Noa as its pilot .
History
After separating a Messer from the deck of a Galcezon, Hathaway boarded the Cargo Pisa, which had descended towards Earth, and entered its deck. He then saw the Xi Gundam stored within the ship and slid into its cockpit. The ship's altitude plummeted every second, but Hathaway activated the MS, escaped from the ship, fended off an enemy MS unit, and lowered his MS towards the surface of the ocean. The Penelope was in pursuit of the MS and released Funnel Missiles which crashed on impact with the ocean surface, creating columns of water. The Xi Gundam glided just above the water's surface and launched its Beam Rifle in front of itself as a decoy. This attempt was successful as the Penelope fired at the Beam Rifle. The Xi Gundam used the opportunity to confront the Penelope and unleashed the Funnel Missiles .