Technology & Combat Characteristics
The design of the Xeku Eins is based on reliable, proven technology, and despite its good overall performance, the mobile suit itself has few distinguishing features. However, its sturdy frame and high generator output allow it to carry a large weapon payload, and the multipurpose latch and mount system built into its shoulders allows the Xeku Eins to carry a wide variety of optional equipment. As a result, this general-purpose mobile suit can reproduce the abilities of many different specialized machines. The capabilities of the Xeku Eins are highly regarded by the pilots of the instructor corps, and with the outbreak of the Pezun Rebellion, it becomes the main mobile suit of the New Desides.
There are three known configurations for the Xeku Eins. Type 1 is the most basic configuration, using a beam rifle with an attached grenade launcher. The mounts on its shoulders are for landing devices and external propellant tanks. This configuration is used by the pilots of the New Desides when they land their mobile suits on the lunar surface on March 13, UC 0088. It's also possible to replace the propellant tanks with a shield in order to arm the Xeku Eins with beam sabers.
Type 2 is armed for long-ranged assault. This configuration uses a long-range beam smart gun with a disc radome on its left shoulder. A shield, which holds up to two beam saber, can be attached to one or both shoulders. The Type 2 is used in the first encounter between the New Desides and Task Force Alpha on February 29, UC 0088.
Type 3 is a heavy assault configuration. Originally intended for attacking and defending space fortresses, it is armed mainly with projectile weapons. Its main weapon is a large 120mm machine gun with a high rate of fire, and it carries roughly 6000 rounds of ammunition in each of the huge drum magazines attached to its shoulders. Like the Type 2, this configuration has a pair of shield mounts in its shoulders, holding beam sabers and latches for optional equipment such as clay bazookas, bazooka magazines, and smoke dischargers. This is effectively the standard configuration of the Xeku Eins. The pilots of the Instructor Corps use this version to wipe out the regular Earth Federation Forces mobile suits stationed at Pezun, and after declaring themselves the New Desides, they continue using it throughout the Pezun Rebellion.
History
When the Earth Federation Forces captured the Pezun asteroid base towards the end of the One Year War, they unearthed a treasure trove of new state-of-the-art mobile suit schematics that the Principality of Zeon were developing. One of the Zeonic designs discovered at Pezun in the five years following the One Year War was the "X Series" mobile suit development project. When the "X Series" data was discovered it as handed over to the lunar-based mobile suit construction firm, Anaheim Electronics, where the data was redesigned into the RMS-141 Xeku Eins and several units were built and sent to the Pezun base for testing.
In UC 0088, after the Gryps Conflict and the fall of the Titans as an organization, the Pezun asteroid base fell to a mutiny by Titans loyalists calling themselves the New Desides, and began using the Xeku Eins to great effect against the Earth Federation forces, and would prove to be a thorn in the side of Task Force Alpha, which was assigned to deal with the problem.
Later, in UC 0091, Titans remnants would continue using the Xeku Eins, alongside other Titans mobile suits, in their battles against Londo Bell, the new Earth Federation unit specialized for hunting down groups like them. Even with the new MRX-013-3 Psycho Gundam Mk-IV G-Doors on their side, and support from the mysterious "Mr. Enkidu", they were no match for Londo Bell and their ace pilot, Amuro Ray.