Moritori Rex

The son of Menniker, Moritori Rex devised a means to observe Mobius from the zone in which the Legion were imprisoned, and used this knowledge to attack the vulnerable Echidnaopolis in the time of the Guardians Hawking and Tobor. He became locked in mortal combat with Tobor, and using a teleportation device transported them both to the Floating Island, ruined by nuclear fallout. Both became wounded, and then separated. When Guardian Hawking came to find his son, Rex deceived the Guardian and went with him to Haven, where his eyes, blinded by the battle, were replaced by a multi-functioning visor.

Over the next several decades, Moritori posed as Tobor and served as a Legion spy inside the Brotherhood of Guardians. His deceit came to an end when he revealed himself to Knuckles the Echidna. Fleeing Haven, once again blinded, this time by Spectre, Tobor's son, he returned to the Dark Legion, becoming a high ranking member, and his eyes were replaced again by superior Legion implants that were virtually identical to his original eyes. Some time during Sonic the Hedgehog's year in space, however, he was taken captive by Dr. Finitevus and subjected to experiments so that Finitevus could learn more about the Guardians' Chaos abilities, which Moritori shared due to his impersonation of Tobor. After the scientist learned all that he needed from both Moritori and the captured Brotherhood, all of them-Moritori presumably included-were thrown into the Twilight Zone.

An original plot idea was that Moritori Rex would have been one of the Echidnas who had been sent to the Egg Grape Chamber by Hunter's spear, which would have explained why he has not been seen for so long.