Baron Pluto ranks among the four ruling lords of the Inma Empire, holding the specific noble title of Baron. A distinctive serpentine twin protrudes prominently from his body. His supernatural power grants him piercing X-ray vision, which he uses to detect the hidden Venus symbols marking the Venus Warriors. As part of the Inma Empire's infiltration of Golden Star Academy, Baron Pluto operates covertly under the human alias Hideki Meino. In this guise, he serves as the academy's top Physical Education instructor. His faculty position facilitates the Empire's critical mission to locate the Venus 5 warriors and advance their objective of resurrecting Apollo.