Autobot, friend of Optimus
Prime, his
old master, who turned his back on him to
help the decepticons rebuild their planet back, the Cybertron.
Sentinel
Prime : I'm sorry I betrayed you, Optimus.
Optimus Prime : You didn't betray me, you betrayed yourself, *Points
gun at Sentinels Head*
Sentinel Prime : No Optimus, NO!
Optimus Prime : *Bang bang
bang*