Canon template

Why do you want this character?: He's funny! I always had a soft spot for Omega. I also really like Team Dark as a whole and since Shadow is taken I'm sure I can have fun playing him.

Personality: He's a ruthless machine! Bloodthirsty, violent towards his enemies (even though we can't really talk about blood since most of his preys are eggman's robots)! Despite that, he still very much cares about Shadow and Rouge and trusts them. That's not the case for the rest of the Freedom Fighters though, except for Cream the Rabbit and Big the Cat.

He analyses a lot but he still tends to be blunt, rude and reckless. He will not run away and will fight until his body is fully destroyed, as he says: "VICTORY OR DEATH!"! Oh, and he also really, really hates the Eggman Empire, obviously, that's why he will use any excuse to go on a rampage against it.

Online username:
I don't think he would use socials, but I guess something along the lines of:

living_artillery_e123

Wiki: https://sonic.fandom.com/wiki/E-123_Omega

Audition: Omega was standing still as Angel Island began to fall. His mechanical heart felt no empathy towards the civilians, as per usual. He wasn't programmed to care for others. Shadow and Rouge, and to an extent, Maria, were the only people he trusted and cared for.

"ASSESMENT: ANGEL ISLAND HAS FALLEN. CURRENTLY MATCHING HISTORY REPORTS..." he stopped for a few seconds, the data was matching the event. "CALCULATING PROBABILITY OF DOCTOR EGGMAN'S IMPLICATION IN THIS MASSACRE... RESULTS: 63%."

He then started walking towards the location of the Eggman Empire, speaking to himself in the process: "PRIMARY OBJECTIVE: FIND AND EXTERMINATE EGGMAN. SECONDARY OBJECTIVE: LOCATE ROUGE AND SHADOW FOR SUPPORT."

His reactor activated and he started blitzing towards his goal. This time, no one would stand in the way of his revenge. He will prove he is the strongest robot in the world by any means necessary.

(if that's not enough I can add more)