Mainspring

Mainspring is a Velocitronian from the novels portion of the Aligned continuity family.

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

Mainspring is a mechanic, content to work behind the scenes and in the pits on his native world of Velocitron, repairing those competing and optimizing them for speed. Nevertheless, he does sometimes tire of his life fixing wheeled vehicles, and yearns for other challenges on other worlds, and likes to measure things, especially time. This may be because he is, in fact, a fifth of an ancient, legendary combiner.

Fiction

Aligned novels

Mainspring was the chief of Blurr's pit crew. Soon after the Autobots' arrival on Velocitron, during a celebration after the Speedia, he was hanging around the edge of a crowd of Velocitronians, led by Blurr, talking with Silverbolt. He asked Silverbolt if he was the fastest flier where he came from. Silverbolt replied that he had never seen one faster, but then humbly admitted that he'd never actually been in a race before. Blurr introduced him and commented on his need to measure everything, and Silverbolt joked that the next time he saw Starscream, he would race him.

Sometime afterward, Mainspring completely surprised Optimus Prime, asking him if he could come with him, claiming that he had never really fit in on Velocitron. Exiles