A long time ago in a galaxy far, far away....
Omega is best known as the youngest and most determined member of Clone Force 99, the renegade squad nicknamed the Bad Batch. She was one of only two unaltered copies of Jango Fett's genetic template, the other being Boba Fett, and she grew up quietly in Tipoca City as a medical assistant to the Kaminoan scientist Nala Se. When the Clone Wars ended and the Empire rose in 19 BBY, she befriended the Bad Batch and escaped Kamino with them, leaving behind the only home she had known. As she travelled with Hunter, Wrecker, Tech and Echo, she learned to fight with a Zygerrian energy bow, took on jobs for the information broker Cid, and was chased by bounty hunters including Fennec Shand and Cad Bane. She saw Tipoca City destroyed, grieved when Tech was killed on Eriadu, and was later taken to Mount Tantiss because her unusually high M-count made her vital to Doctor Royce Hemlock's cloning research. She escaped with Crosshair and brought him back into the family. After she gave herself up to protect the people of Pabu, she helped free the Force-sensitive children held at Tantiss before her brothers rescued her and Hemlock was killed. She then spent peaceful years on Pabu before leaving as a young adult to fly for the Rebel Alliance.
Nala Se creates Omega in her private laboratory in Tipoca City as an unmodified female copy of Jango Fett's template. Only Omega and Boba Fett are pure copies of that template.
Omega works as Nala Se's medical assistant. She is present when Clone Force 99 is created, then follows the squad's wartime exploits from Kamino without ever meeting them.
After Order 66 and the proclamation of the Empire, Omega introduces herself to the Bad Batch and stands up for them in the mess hall. She also warns Hunter that Tarkin does not trust clones.
Omega is imprisoned for snooping in the squad's barracks. She helps the Bad Batch break out, fires a blaster for the first time against Crosshair, who is now loyal to the Empire, and flees Kamino aboard the Marauder.
Omega sees dirt and sunlight for the first time at Cut Lawquane's farm. She delivers forged chain codes so the family can escape, but refuses to leave with them and returns to the squad instead.
Omega crawls into a moon dragon's den to recover the Marauder's stolen power capacitor. Wrecker gives her a room of her own, and Hunter tells her she is part of the squad.
During a supply run on Pantora, bounty hunter Fennec Shand, hired by Nala Se, tries to take Omega. The squad rescues her.
On Ord Mantell, Omega frees her captured squad by releasing the rancor Muchi and picks up a Zygerrian energy bow. On Corellia, the squad teams up with Trace and Rafa Martez to steal a tactical droid head.
Omega goes with Rex and the squad to Bracca, where the clones' inhibitor chips are removed. Cad Bane then kidnaps her, but she escapes him at the Bora Vio cloning facility and the Bad Batch rescues her.
Omega helps rescue Hunter on Kamino as Imperial Star Destroyers level Tipoca City. She leads the group to safety through the tube system and nearly drowns trying to save AZI-3, but Crosshair pulls her out. Crosshair then chooses to stay with the Empire.
Omega goes on jobs and missions with the squad on Serenno, Serolonis, Skara Nal, Kashyyyk and other worlds.
The squad helps Senator Riyo Chuchi expose the Empire's destruction of Tipoca City. Echo then leaves to join Rex's Clone Underground, and Omega says a tearful goodbye.
After breaking with Cid, the squad works with the pirate Phee Genoa and finds the island haven of Pabu, where Hunter hopes Omega can have a peaceful life.
The squad's attempt on Eriadu to find Crosshair through Doctor Hemlock goes wrong, and Tech dies making sure the others escape.
Cid betrays the Bad Batch, and Omega is taken to Mount Tantiss. There she is made to work alongside Emerie Karr and Nala Se, and her blood tests reveal a high M-count that Project Necromancer needs.
With help from Nala Se, Omega frees the imprisoned Crosshair. The two escape Tantiss together and rejoin the Bad Batch.
Omega learns that CX troopers are hunting her because of her M-count and lies low on Pabu. Asajj Ventress tests whether she can use the Force, but the results are inconclusive.
When Imperial forces raid Pabu, Omega gives herself up to CX-2. She is taken back to Tantiss and meets the Force-sensitive children held in the vault.
Omega leads the children and imprisoned clones in a breakout while her brothers attack the base. Hemlock is killed as Hunter and Crosshair rescue her.
Omega and the surviving members of Clone Force 99 settle on Pabu and live there for many years.
As a young adult, Omega leaves Pabu to become a pilot for the Alliance to Restore the Republic.