He is another Boazanian colleague and ally of Doctor Kentarō Gō who escaped with him to earth.

Spoiler

He is the leader of the Boazanian refugees/rebels on earth and helped Gō construct the Solar Bird, a giant spaceship that is designed to be the partner for space travel for Camp Big Falcon. After Gō was re-captured by General Gururu, he led the Voltes team and Camp Big Falcon to Boazania to launch the final attack on Emperor Zambojil and his regime.

(Source: Wikipedia)