Optimus Prime

"At the end of this day... One shall stand. One shall fall."
- Optimus Prime to Megatron. Optimus Prime and his Autobots have traveled through the galaxy for thousands of years through space in search of the AllSpark. For all that time, Optimus has held one thing in mind - to protect the universe from the evil of Megatron and his Decepticons. For him nothing is more important than freedom; he will sacrice all for its preservation, including his own life.