Optimus Prime, or Orion Pax used to be the leader and the founder of the Autobots (But not the Autobots as a Political party) Orion Pax used to be a Data Clerk, until Sentinel Prime died (or another sentinel prime, there's two sentinels, as I will use one for the "Autobot Civil War" Optimus has always thought he had way too heavy a burden on his shoulders, as he had to carry the Matrix, defeat the Decepticons (with every Autobot backing him, and hoping things wouldn't get darker. Optimus' first body is the first one (War For Cybertron), which is the one he took, since it was stronger than his old form when he was Orion. When he got heavily damaged, he took his G1 body, but got damaged in that one and took a more cool-looking, futuristic-looking form (TF:RID), which is the form he died in,