Canon History

Mirage is what humans call "old money." Before the war, he was a member of affluent Cybertronian society, with his own large estate and high-priced friends. He enjoyed the finer things in life: vintage energon, swank evening events, and turbofox hunts on the grounds. But when the war started, he was forced to choose sides and found himself banded with a group of commoners he didn't really understand.

Some of the other Autobots don't trust Mirage. He feels the war, even after all these millions of years, is beneath him. War is not, after all, how civilized, erudite beings conduct themselves. He often questions the Autobots' violent means, and not-so-secretly hopes they and the Decepticons can get along. Because of this, he has been labelled by a few others as a Decepticon sympathizer. Still, he sided with the Autobots for a reason, and he is there for the Autobots when they need him.

Although the details vary by continuity, Mirage has the ability to create illusions which typically either render him invisible or make him appear to be somewhere he isn't.

Cracktran History

Mirage is a quiet one because he's just been picked up from one mun to another for the most part, though he doesn't seem to be afraid of telling Prime and Megatron when their strategies suck aft. He was recently on a long and lucrative months-long mission to find each and every S7 hideout, and has vowed to sleep for a week afterwards and spend some quality time with vintage Cybertronian pinups now that he's back.

Alas, that was not to be. Our newest enemy of the month, the Vok, decided that a nice invisible car would serve their purposes NICELY as a spy, and reprogrammed him to be loyal to them and them alone.

(Mirage has bad luck with that.)

But after an epic battle, he was retrieved and deprogrammed again! Only to learn that his nemesis, Bombshell, was on the base and had been for some time. Cue a very quiet breakdown. Mirage has issues, and lo, they are weevil-shaped. This has led to a strange sort of camaderie with both Tracks and Bonecrusher, who have also had unpleasant encounters of the weevil kind. He has added another Weevil Encounter to his resume by attempting to scout out the weevil drones infesting the Nemesis and being further scarred for life by them. (So, apparently sometimes weevils explode when you snipe them...)

Mirage has exchanged booze with Bonecrusher - some people might say that trading moonshine and premium-grade vintage energon might not be the fairest thing ever, but Mirage isn't complaining, and neither are Bonecrusher or Tracks. This incident may or may not have led to Mirage/Tracks/Bonecrusher, as enabled by said premium-grade. Bonecrusher apparently has Charisma (shiny blue cars) + 15 or so.