Rebak served as an operative for the Rebel Alliance throughout the Imperial Era. The Rebellion, at one juncture, began engaging in transactions with the criminal organization known as the Hidden Hand, seeking to procure weaponry. Rebak, as a member of the Rebellion, sought to acquire a quantity of bot-drones from Wef, a arms dealer linked to the Hidden Hand who conducted business on the celestial body Heva.
In 1 BBY, during the hunt undertaken by cyborg bounty hunter Beilert Valance to locate the Sith Lord Darth Vader, Wef divulged information about Rebak's arrangement to Dengar and Honnah, members of the bounty hunter's crew. The arms dealer characterized her as a challenging negotiator and indicated her interest in purchasing the same bot-drones that Valance's team also aimed to secure from him. In the end, Valance and his companions obtained the drones and employed them against the Imperial Star Destroyer Formidable, which had trailed them to Heva.
The comic-book miniseries Star Wars: Target Vader, specifically the third issue, featured Rebak's mention. This issue, penned by Robbie Thompson, was released by Marvel Comics on September 25, 2019.