Sir Charles Hedgehog (SatAM)

Sir Charles Hedgehog is a character that appears in the Sonic the Hedgehog television series. He is a Knight in the service of the King, a respected and brilliant scientist, and the uncle of Sonic the Hedgehog. When Charles invented the Roboticizer, the project was stolen Dr. Robotnik, who used it to enslave his people, with Charles among the first to be roboticized, an event that drove Sonic to become a Freedom Fighter.

For the next ten years, Charles served as a mindless slave to Robotnik. After many failed attempts, Charles regained his free will thanks to Sonic and the Freedom Fighters, and served as a spy for the group within Robotnik's forces.

History
While living in Mobotropolis, Charles earned a knighthood from the King for serving the kingdom. At some point, Charles invented the Roboticizer, hoping to use this technology to help the elderly live longer and cure the sick. Little did Charles know that Warlord Julian discovered the invention and stole it, intending to use it to pave his way to enslave Charles' people and seize control of Mobotropolis, making Charles unwittingly responsible for the rise of Robotnik. Following Julian's coup, who had now renamed himself Robotnik, Charles was captured and was among the first of the population to be robotized, turning him into a mindless drone in the service of Robotnik.

Over the next ten years, Charles labored mindlessly for Robotnik. One day, Sonic and his friends spotted Sir Charles in Robotropolis and used a Power Ring to restore his free will. Upon regaining his senses, Charles revealed to the Freedom Fighters that Robotnik was using a machine called the Dinobot to dig out a large crystal from some crystal mine to power his machinery. After the plot was foiled, Charles reverted back to his robotic self, forcing the Freedom Fighters to leave him behind.

Some time later, Charles was captured by the Freedom Fighters, who took him back to Knothole, where they used a prototype De-Roboticizer to return him to normal. However, effects were only temporary, and Charles subsequently reverted back into his robotic self once again. When Chuck returned to Robotropolis, Sonic managed to restore Charles' free will permanently. Charles then decided to stay in Robotropolis where he would remain undercover as a spy for the Freedom Fighters, while pretending to still be a mindless slave, up until Robotnik's defeat.