Sentinel Primal is the leader of the Shattered Glass Maximals. He is very evil and cruel. Optimus Primal use to be the leader but was annihilated by Lio Convoy when he tried to asassinate the Cybertronian princess which made Sentinel rose up, not munch later Rattrap and a group of Rogues resurrects Optimus Primal, and Sentinel was killed by the now named "Optimal Optimus", same as Grimlock, after being defeated in the war against the Decepticons, he transplated his spark into a new body since after Optronix's rise to power, the "Original" Sentinel Prime was never seen again, his beast mode is a Dark Of The Moon colored Gorilla.