A mysterious and supremely powerful robot under the thrall of the Quintessons, Guiltor was built from technical data stolen from both sides of the Cybertronian conflict. In particular, his design resembles a mix of Optimus Prime and Megatron's old bodies, and he possesses many of the abilities those leaders once possessed. Despite this, however, the true threat that Guiltor represents is psychological in nature. He relishes forcing the Transformers to relive the worst moments of their lives and mock them for their failings. Can the Transformers counter Guiltor's incredible power and sadistic mind games, or will the Quintessons' new champion prevail?