Prof. Mamoru Kazuki is a scientist who perceives the imminent threat of Earth's invasion by the Izaru people. To counter this threat, he designs and builds a unique defense robot utilizing magnetism and sphere joint theory. This robot serves as Earth's primary defense mechanism.

His strategy includes overseeing a dangerous physical augmentation process for his daughter, enabling her to pilot a vital component of the robot system. His scientific work and leadership make him a central figure in organizing Earth's resistance.

The robot requires specialized pilots who undergo a physical transformation to fuse their bodies into a metallic plate. This plate then integrates with the robot's frame to activate and control it, reflecting his innovative mecha design.

In international adaptations, the character is also known as Sir Miles Nevers, indicating a reinterpretation of his identity in certain releases.