The Brave is a next generation mass production successor to the Union Flag and AEU Enact, installed with the latest developments in GN technology. It is a pre-production model in testing stages and its design and technology are based on the Masurao. It is being developed by a team of engineers who originate from both the Union and the AEU power blocs. The Brave is primarily meant for use in an emergency deployment mobile suit squadron. This squadron would need to be deployed and enter combat zones in a short amount of time. In addition to its high mobility and the flight mode's long distance travel capability, the Brave also has overwhelming firepower.

The transformation ability of the unit is helped in part by the new Leif OS. While most of the transformation structure is derived from AEU/Union flight models, the arms being folded to the rear is new, and revolutionized the entire transformation structure for the ESF. This is attributed to the feedback from data of the captured Kyrios.