Optimus, a blue roan and red roan stallion, stood watch over his herd of horses, known as the Autobots. The Autobots consisted of Arcee, Wheeljack, Cliffjumper, Bumblebee, Bulkhead, Ultra Magnus, Smokescreen, and Ratchet. Their human allies, Jack, Raf, Miko, Agent Fowler, and June, were a daily constant.