Dr. Nobuhiko Komyoji is the creator of Kikaider and his prototype Kikaider 01. A top robotics expert, he was captured by DARK to help them build an army of murderous robot monsters known as Destructoids. He secretly built Kikaider to not only PROTECT his two children Mitsuko and Masaru, but to save the world. His brain was also placed into the cyborg android Saburo as a trump card against Kikaider.

(Source: Kikaider Wikia)