E-123 Omega is a robot created by Dr. Eggman and is the final unit of the Doctor's E-100 series. Omega was released from storage and was tasked to destroy the rogue robot, E-102 Gamma. Although successful, Gamma managed to reprogram Omega to grant him free will before being eliminated. Following this, and a conversation with Shadow the Hedgehog, Omega decided to follow in Gamma's footsteps and fight the Eggman Empire as an agent of the United Federation's defense forces, the Guardian Units of the Nation, where he later became a member of Team Dark.

Like many of Eggman's robots, Omega was very limited in personality, but thanks to Gamma reprogramming him, he has free will and has gained a personality of his own. Back when he was subservient to the Doctor, he followed orders but had a large ego and a keen sense of sarcasm. Now free to act as he pleases, his sarcasm developed into a dry sense of humor. Omega is also very blunt and non-descript, often calling things as he sees them, rather than calling things or people by their names. Omega carries a sense of pride about him and loves to destroy things, but he will not let such things get in the way of the goal of whatever mission he is tasked with. His main goal throughout the comics is to take down Eggman and his Empire. 

With this voice, we highly request you do takes with a robot filter similar to how they filter Omega's voice in the games.