As the ASW-G-08 Gundam Barbatos fought many battles with its pilot Mikazuki Augus, it became too damaged to be repaired. It was then sent to the MS Workshop in Saisei, the home base of Teiwaz, for an overhaul. The new name "Lupus" was given by the Saisei's Chief Mechanic, who was also responsible for the mobile suit's maintenance.

Based on Mikazuki's combat data, the mobile suit was reconfigured as a close combat unit, and its reaction speed and mobility were also increased, with adjustments made through the Alaya-Vijnana System to deepen the link between the machine's movement and the pilot's own senses. As a result, the Gundam Frame's response rate was adjusted to match with the speed that Mikazuki senses. Other changes to the suit's frame include the arms' frame being lengthened to match Mikazuki's senses, while the legs' frame was modified and has ground-use suspensions to help adapt seamlessly to combat in all environment. Lastly, frame parts in the arm and leg joints were replaced by those reproduced by Teiwaz, this helps to resolve the accumulated damages and also improved their movability.