Roboleon is a robot general in the Magellan Empire's invasion forces, commanded by Lady Baracross. He wears a distinctive Napoleon-style hat and is constructed from rose cloth. His characterization blends ruthless efficiency with comedic elements, particularly in his methods and interactions. Roboleon readily purges subordinates who fail or surrender, displaying no loyalty even toward allies. This trait is exemplified when he betrays his collaborator Dulles immediately after exploiting him for a coup attempt against Emperius. Roboleon oversees the deployment of the Magellan Empire's primary weapons, the Beast Bone mecha—robotic constructs mimicking skeletal structures of various creatures. He remains a consistent antagonist throughout the narrative, showing no evolution or redemption. His creation and operational directives are directly tied to Lady Baracross within the Magellan military hierarchy.