Bilstein is the main antagonist of the Star Gladiator series who leads the Fourth Empire. Once a physics expert on Earth,
he soon started developing plasma weapons. He now employs these weapons in his attempts
to conquer Earth along with his war clones and robots. He wields a plasma
broadsword in battle.
once stumbled upon a research document left behind by one of his ancestors. It
described Plasma Power and how it could be derived from human emotions.
Bilstein was driven by his ancestor's evil will because they were unable to
complete the project and that Bilstein himself had decided to carry out their
work and build the unknown Plasma weapon. However, before Bilstein could
realize his evil plot, he was detected by the Earth Federation and was then
arrested for violating human rights, using actual human bodies in his
experiments. After escaping his prison and forming his "Fourth
Empire" organization, Bilstein now seeks to conquer the entire universe
and establish a new order under his own rule.
After his cybernetic body was destroyed at the end of Star Gladiator by Hayato, Bilstein was able to transcend his spirit into another cybernetic host. The remains that he left behind had assumed a skeletal visage, and took on a life of its own, obsessed with killing Hayato. This form is known as Ghost Bilstein or