Bem

A scientist race from the Archie-published comics, the Bem all appear to be identical females, possibly due to cloning. The Bem travel the galaxy, and on several occasions their journeys have brought them to Mobius. The Bem recovered Shadow the Hedgehog from falling into the atmosphere, restoring him to health and giving him the energy to achieve Super Shadow to hold off the Xorda while they escaped. Later on, Sonic visited the Bem planet of Argentium, also known as Wheel World, where he found Amadeus and Rosemary Prower. Sonic eventually used a Bem wormhole to return to Mobius, finally ending the banishment imposed on him by the explosion of the Quantum Dial. Under the impression that Sonic was the renegade Bem Ceneca 9009, but unwilling to pursue his one-seater ship into Xorda space, the Bem allowed him to escape. Some time later, Sonic returned to Wheel World with Knuckles and Tails to find it in ruins with the Xorda and the Black Arms fighting in orbit.

Ceneca 9009
A Bem scientist from a distant galaxy, Ceneca 9009 was the first to invent a safe de-roboticizer. She developed this process to help the population of Biotex, whom were all metallic. Believing this condition unnatural, she used her device on them, only to discover an awful truth: The metallic physiology of the Biotexans had evolved as a defense against lethal microbes in their homeworld's atmosphere. Robbed of the their defense, the Biotexans died out, and the de-roboticizer was outlawed.

Ceneca later came to Mobius when Robotnik was about to take power, and de-roboticized Amadeus Prower and abducted him and his wife Rosemary. Ceneca had hoped that the evil process being used on the Mobians would galvanize her people against Eggman, but instead she was imprisoned for using the outlawed device. She served her sentence, and begged her people for the opportunity to convince them of Mobius' plight. Returning to Mobius, she conducted an experiment with Sonic, Tails, Snively, and Dr. Eggman to determine whether organic or Roboticized beings were superior, which resulted in Sonic and Tails becoming mechanical and the Robotniks becoming organic. The battle culminated in Mecha-Sonic and Tails' victory, thus leading the Bem to believe that it was better for the Mobians to be Roboticized while Robotnik and Snively were left organic once again. Following the experiment, the entire Robian population disappeared, only to reappear later one by one, everyone deroboticized except Sonic's father, Jules. It was later learned that Ceneca 9009 reversed the process with her outlawed device, only to be sentenced to death; she had in fact been ordered to Roboticize all the Mobians after the experiment revealed that Mobians were stronger in Robian form. However, she was saved from execution by Sonic the Hedgehog, who had come to Argentium due to being thrown across the galaxy after a battle with the warlike Xorda.

When Ceneca, Sonic, Amadeus and Rosemary needed to escape, the only vessel they had to take them to Mobius was a one-seater. Despite Sonic's protests, neither the Prowers nor Ceneca would board the vessel. So, they arranged a compromise: Sonic would take the ship back to Mobius. Since his existence was largely unknown to the Bem, they would assume that Ceneca had escaped. In turn, the Bem would not dare follow, out of fear of the dangerous Xorda. Ceneca, meanwhile, remained on Argentium with Amadeus and Rosemary, on the run but safe-until the Xorda and Black Arms devastated Argentium in their conflict.