Kagestar was assisted his similarly empowered white-skirted partner Bellestar (Emi Hayakawa) who rode a motorcycle of her own called the BelleCar and had a small bell on her bracelet that rang to warn her of danger.
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Originally fighting American comics-style costumed crooks, in later episodes his foes became Kamen Rider-style mutated monsters created by his archenemy Dr. Satan (Goro Naya), a former Nazi scientist turned megalomaniacal mastermind also identified in some English language sources as Dr. Saturn.