Junior was a Rancor housed within the enclosures of the Palace of the Eternal Dragon on Zakuul. This occurred in 3630 BBY, specifically during the Grand Festival of Empress Vaylin. The Beast master Oleg unleashed Junior to attack imprisoned Zakuulan insurgents following the disruption of Eternal Empress Vaylin's address by the Alliance Commander and former Emperor Arcann's unexpected entrance. Nevertheless, the Alliance Commander, along with Theron Shan, infiltrated the animal's lair, eliminating Junior before it could inflict damage upon Indo Zal and the rest of the rebels.