Omega was an enhanced human female clone who lived in the years following the Clone Wars. She was a medical assistant to Nala Se. She spent her days on the clone homeworld of Kamino. When the war ended, she took an interest in Clone Force 99, who had returned from a battle on Kaller. Later, when Wilhuff Tarkin arrived on Kamino to assess the clone troopers, she joined Clone Force 99 and escaped Kamino.
Omega accompanied Clone Force 99 on their subsequent visit to Cut Lawquane’s farmstead on Saleucami, which was her first time away from Kamino. There, she made friends with the Lawquane children, Shaeeah and Jek, and helped secure the family’s escape by delivering forged chain codes to them so they could board a transport. She was given an opportunity to go along with them on the transport, but decided to remain with Clone Force 99.