Some might say that Mirage was created with a silver sparkplug in his mouth. On Cybertron, he was one of the planet's elite upper class, preferring to spend his days hunting turbo-foxes instead of involving himself in conflict. When that became unavoidable, Mirage enlisted with the Autobot forces, although he is often unsure about his motivations for doing so, which leaves his fellow Autobots finding it hard to trust him - a problem not helped by the fact that Mirage can rarely hide that he is often unwilling to fight directly, or his contempt for the "commoners" he is now forced to interact with. He has no lost love for Earth, and would happily return to his old life on Cybertron if he could.
It is ironic that, given his unwillingness to fight, Mirage is a superior hand-to-hand combatant, and a skilled sharpshooter, having honed his talents hunting game on Cybertron. He is armed with a rifle which fires explosive, armor-piercing darts, but the most important piece of his arsenal in his function as a spy is his shoulder-mounted electro-disruptor, which can bend photons to make Mirage invisible, or appear to be where he is not, or even alter his physical appearance, hence his name.