The RX-78-2 Gundam was driven by Amro Ray, the son of Dr. Tim Ray, who developed the RX-78, by chance. The first generation Gundam, which left a great name in history, is probably the one that comes to mind when the word "Gundam" is mentioned. This aircraft is the second in the RX-78 series of the "V Plan", and was a participant in Gundam's first MS battle in history. It achieved miraculous results in the later stages of the one-year war and was referred to as the "White Devil" by Gene's military pilots. However, the biggest reason why this aircraft can be called the "strongest" is that the NT capability of the pilot Amuro Ray is fully utilized on the battlefield.

As a product of the RX series, the Federal Army initially developed it with the goal of universal MS, which, like other aircraft, can achieve multi angle applications by recovering combat data. But in the end, it turned out to ignore the possibility of mass production and invest in the most advanced technology research and development at that time, possessing the strongest performance during the one-year war period. Extremely versatile, it can achieve space warfare and water warfare without any modifications, and has the ability to penetrate the atmosphere with a single machine. Accidentally activated by the civilian teenager Amro Lei, it demonstrated overwhelming performance advantages in front of the Gene MS attacking SIDE 7.