Omega Sentinel is the commander of the legendary Guardians of Cybertron. He is stoic (to the point of seeming emotionless), serious, committed, and logically minded (though he's not adverse to solving a problem with simple brute force if it seems the simplest route). He is greatly respected by his troops on the whole, but still they often feel he is rather stuffy, over-technical, and boring personally. The very traits that sometimes make him a less than charismatic companion, however, are the ones he believes will serve the Autobots best in their ultimate goals. He is composed of a "battle train", a warship, and a small robot that transforms into a larger head for their combined robot mode.