E-123 Omega

"I am Omega, the ultimate E-series robot!"

- E-123 Omega, Sonic Heroes

E-123 Omega is a supporting character from the Sonic the Hedgehog series. He is the last robot in Eggman's E-series line, fittingly named "Omega". After Eggman had moved onto to building bigger and better robots, he locked Omega away in one of his bases, with the implied purpose being to contain Shadow. After Rouge unwittingly awakened him, he decides to take revenge upon his creator to prove his worth, joining Rouge and Shadow on their quest. Sometimes later, he would join his two friends as apart of GUN.

Personality
Omega has a very complicated personality, only single-mindedly focused on his revenge mission and nothing else. Likewise, he considers himself to be the best of Eggman's creations, as he degrades every other robot created before him as complete rubbish. Omega does grow to consider Shadow and Rouge close friends though, and will always prioritize their word above anything else. Since he was designed as a battle robot, his first directive is to shoot first and ask questions later.

However, Omega does show that he is on the side of good. In Sonic the Hedgehog (2006), he expresses regret when it was revealed that he was the one who sealed Shadow away, and it was implied to be against his will. Omega is also quite capable of empathy. When Rouge shows concern in Sonic Heroes that Shadow might not be the real Shadow, Omega states, in a roundabout way, that the real Shadow must exist which gives Rouge hope.