The EDF create robotic suits based on Orgun in order to defend Earth. Orgun and Tomoru meet two of the Evoluder: Leave, who dies protecting Orgun, and Rang, who battles Orgun in anger for his treason. It is revealed that the Evoluder are the descendants of a manned space mission Earth sent to the Cygnus constellation 200 years earlier, whose crew evolved into mechanical lifeforms due to experiencing millions of years of time dilation during the journey. Some of the Evoluder are telepathically linked to certain humans, such as Tomoru with Orgun and Kumi with the Evoluder's leader, Mhiku.