Rewrite of original. John-117: a battle-hardened hero of little words. At least that's how most perceive him. But even Spartans have secrets. He celebrated victories. He suffered loss. And once, he loved. Master Chief x OC

She was always teaching people about ways to revolutionise machinery. But after taking a job at N.E.S.T as their mechanic, it turns out the machines have a few things to teach her instead. Optimus/OC Rated for language & sexual content in later chapters.