Graduate of the same class as OPTIMUS PRIME at the AUTOBOT Academy, SENTINEL PRIME is commander of a squad of the best the AUTOBOTS have to offer  the Elite Guard. 

Though he is a powerful warrior and a cunning leader, he is also obsessed with following rules to the absolute letter. He is unbending in his interpretation of procedure, and dislikes the way OPTIMUS PRIME and his crew improvise. If he had his way, that whole group would be sent back to Basic Programming.