Cubber Daine was a male Human who functioned as a mechanic for Wraith Squadron. This New Republic commando group was in its early, temporary squadron configuration when Cubber provided his services. Collaborating with Wraith member Kell Tainer, Cubber's responsibilities included acquiring and maintaining the operational status of the squadron's X-wings, TIE fighters, and CR90 corvette.
During the time of the Galactic Civil War, Cubber Daine spent a year stationed on Hoth. As a mechanic, he heavily depended on a treadwell droid to aid him in his repair tasks, finding the multiple arms and appendages of this particular droid model extremely beneficial. He would often display his treadwell droid to others, highlighting its practical advantages. He was known to perform services, like modifying R2 units, in exchange for opportunities to receive pilot training. Furthermore, he harbored a dislike for brand-new X-wings, due to their propensity for experiencing technical issues.
However, he was also prone to exaggerating the extent of work needed for repairs, with the intention of giving commander Wedge Antilles the impression that he was exerting more effort than he actually was. He had a daughter aged six, of whom he boasted possessed superior lying abilities compared to Kell Tainer.
He was the progenitor of Zindra Daine, who became a fighter pilot during the Yuuzhan Vong War.