Leader of the Autobots:
Optimus Prime is one of the strongest Autobots alive and a formidable opponent in battle. Optimus is armed with two arm energon cannons and long blades. He also possess the Star Saber plus with the Matrix of Leadership, which makes him the strongest Prime alive. After being repaired by Forge of Solus Prime's remaining power, Optimus gained a new more stronger and powerful body with a jetpack and armed with an energon minigun. He also a new energon blaster and rockets in his vehicle form. After Bumblebee killed Megatron with the Star Saber, Optimus reclaimed his weapon though it is not seen using it after that.
Optimus was originally known as Orion Pax, he was very timid and constantly doubted himself at times. Despite this, Orion proved himself to be a capable leader countless times. When Optimus returned to his original form briefly on Earth, he maintained much of the same idealistic traits as he did before his transformation into a Prime. However, one thing Orion continued to possess was his sense of right and wrong. This led Orion to discover Megatron's plan to use his research for evil and to destroy the peaceful Autobots, who Megatron claimed were evil. Unfortunately, Orion's senses of goodness and honor also made him easily manipulated, as seen by his dedication toward assisting Megatron beforehand. As Optimus Prime, he is a very stern and serious leader, not taking jokes, and as Bulkhead described never crying out or losing his cool. But when Optimus does lose his cool, it is due to the Decepticons who irritate him the most. Optimus is shown to not be the party type either. However Optimus can also be at the same time a very caring bot, making sacrifices to ensure the safety of the team and their human allies, he will even go as far as to sacrifice himself to save Earth and Cybertron.
Optimus has a gray face with a blue helmet and antennas of the same color, heavily detailed and designed with multiple plates and layers of pieces on top of each other. Optimus has two sphere shaped bases for his antennas, with dark blue coloring around it. He has a red chest with windows from his vehicle mode and a dark grey strip on both of his ribs. He has big shoulders that overlaps his arms. 2 wheels are at the back held by his smokestacks. 4 wheels are at the back of his legs. Like all of his alternate counterparts, he transforms into a big rig truck. It can attach a trailer to the back blue section. Optimus can go to Maximum Overdrive, which makes him go faster than a normal truck. With his upgrade, he turns in an alt mode similar to that of an experimental all-terrain expeditionary fighting vehicle which was designed by the finest engineers in the army division.