Juno Eclipse was a Human female officer in the Alliance to Restore the Republic during the Galactic Civil War, having defected from the Galactic Empire after she was accused of treason. Born on the Core World Corulag around the end of the Clone Wars, she was the daughter of a civilian engineer and a teacher. Eclipse enlisted in the Imperial Military after her mother’s death, hoping to earn the respect of her father who was a staunch supporter of Emperor Palpatine and the New Order. She was first enrolled as the youngest cadet at the Corulag Academy before leaving her homeworld to embark on a career in the Imperial Navy. Rising to the rank of Captain, her skills in the cockpit attracted the attention of the Sith Lord Darth Vader, who promoted Eclipse to lead his Black Eight Squadron. Though an exceptional TIE pilot, she openly questioned Vader’s methods, which resulted in the massacre of Callos and Eclipse’s subsequent reassignment.

Now assigned to pilot the Rogue Shadow, Captain Eclipse came to work alongside Darth Vader’s secret apprentice, a Sith assassin codenamed Starkiller. They hunted the few remaining members of the Jedi Order that survived the initial purge of Order 66, including General Rahm Kota and Jedi Master Shaak Ti, until the apprentice was betrayed by his master, while Eclipse was stripped of her rank and arrested as a traitor due to her affiliation with Starkiller. Unwilling to abandon Eclipse, Starkiller chose to rescue the disgraced Imperial officer, who supported the apprentice’s efforts to raise a rebellion against the Empire.

Eclipse remained loyal to Starkiller, even after learning that his true allegiance still belonged with the Sith Lord who betrayed him, and over time their rapport evolved into an emotional attachment. After the apprentice was betrayed by Vader once more, Eclipse transported Starkiller to the Death Star where the Alliance’s founders taken. The Rebellion was ultimately saved due to their actions, although Starkiller was killed in battle against the Lords of the Sith. Following the apprentice’s sacrifice, Eclipse became the commanding officer of the Alliance Fleet’s flagship, the Salvation.