Xain
Xain's appearance:
Xain appears to be a parasite taking the form of Sonic, with several noticeable differences. His fur and skin tone are both a darker shade, his sclera being pitch black with white irises. His eyes are bleeding some sort of black substance, with no mouth at all. More of this black substance is coming out from under his gloves, onto his fingers and from under his shoes/socks. His shoes are now purple with the stripes being inverted from white to black. His buckles are now gray as well.
Xain powers:
Since Xain is in Sonic's body, he has the same exact abilities as him, but with benefits. He doesn't have a mouth so his skin just stretches out, showing a bizarre mouth imprint. This is Xain's form of telepathy
Xain's weakness:
It takes a lot to kill Xain, but as of now, no direct weaknesses.
Trivia:
His allies consist of only two people so far, being Xlivia and Curse.
However, his enemies are Dark Fleetway, Sonic and all of his friends.
In non-canon lore, Xain actually has a massive soft spot for Curse. He once tried feeding off his negative emotion, only to realize there was so much of it. Now, Xain basically goes and listens to Curse's problems whenever Curse needs to vent.
Xain actually used to be a subsidiary of Xenophanes, but he is now his own EXE