Originally a triplechanger scientist called Aries, then messenger of Unicron named Harbinger, the entity now known as NEMESIS is well aware of the fact that change is one of the universal constants. Nemesis chose to rebuild himself as a bright mirror of Optimus Prime, adding in a few twists and surprises to ensure the Autobots stay off-balance when it comes to dealing with this warrior of order. The trailer portion of his Cybertronian tractor trailer altmode can transform into a mobile base of operations, complete with repair facilities as well as additional firepower to augment his offensive capabilities.