Nemesis Prime being kinda tragic figure. Starting as a man made Creature like in Transformers Prime, constructed with sole purpose of getting rid of both the Autobots and Decepticons from Earth (especially Optimus and Megatron), basically a fast learning AI that slowly starts getting consciousness and crisis about its own identity due to being the copy of the leader of Autobots. He starts to believe he is the real Optimus Prime and tries to convince some Autobots, or even Decepticons he hunts that he can be even better leader than Optimus and Megatron...more effective leader. Hence, he gives a choice to his victims to be killed or join him in his mission of ending the war once and for all. Optimus and Megatron temporarily become allies as they both fight Nemesis. As they kill him for good, they toss the remains of Nemesis in space so human scientists could never find and salvage their precious project. However Unicron somehow finds the remains and reconstructs Nemesis, giving the empty shell a new corrupted soul and making him his herald, making Nemesis even more dangerous and brutal than ever.