Nicole and... I think his name was Shard? They were characters from the Archie Sonic Comicverse before it was killed off because of that one idiot's lawsuit.
Nicole is the AI helper of Princess Sally from SatAM; in the comics, she gained the ability to project herself as a hologrammatic mobian in the form of a lynx.
Shard was a renegade Metal Sonic, inspired by the Metal Sonic from "Sonic the Hedgehog: The Movie", who gained independence from Robotnik's control and was rebuilt as a secret agent on the side of the Freedom Fighters.