Prime-8 is the biggest and sadly the most childish of the Roborg trio. He is very overprotective about Koji's mental disorder associated with anger, and fears that continous anger will only make his condition worse. Prime-8 serves as the head for the Gorilla Busterzord, and can merge with the Blue Spy Ranger to help him become the Blue Super Spy Ranger when he uses the Vortex Visor. Prime-8 can become the head for the Hauler Busterzord to make it Interface Mode. When Prime-8 merges with the Blue Spy Ranger, he can become the Blue Super Spy Ranger.