The Autobots, led by Optimus Prime, are a benevolent race of living machines. They are the protagonists of the hit cartoon and comic book, The Transformers. They always fight the evil Decepticons to prevent them from taking over the Universe.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...