Ryuzaburo Tatewaki aka Bill Goldy is an evil cyborg duplicate of Janperson, originally a human, he is a lunatic and the president of a company known as Tatewaki Konzern. He is usually seen licking a lollipop while watching Janperson fights his assassins. He later became a cyborg, via an operation, from the blue prints of how Janperson was made. He usually executes silly plans at first, but later on became serious with his schemes. He tried to frame Janperson, by impersonating his identity through his alter ego, as Bill Goldy, and used his name, in vain, but ingeniously failed. In the end, Janperson and Gun Gibson killed him once and for all, as the only means to save the world, as he was already far too dangerous. He was stabbed by Janperson, at the heart, with the Jan Blade. His final words before his destruction were, "I'll be back."
Bill Goldy was later revived in the Juukou B Fighter finale special by Jagul, who used him as a pawn before absorbing him into her body. Enraged for this act, Bill Goldy personally dragged her to Hell with him.
- Goldex, his american counterpart from Big Bad Beetleborgs.