Omega can be seen as the Terminus System's version of the Citadel, it serves the hub for most life in the Terminus Systems, making it easier to find races like the Vorcha and Batarians. It is covered in crime and its as dangerous to walk down the street as it is to enter a gunfight. The most powerfull person on Omega is an Asari named Aria, she "rules" Omega, and those who anger her don't even have time to regret it.