Riko Shirai (白井 理子, Shirai Riko) better known by her ring name Riko Kaiju is a retired Japanese professional wrestler. She is best known for performing in the Japanese promotion Pure-J where she is a former Princess of Pro-Wrestling Champion. She is also known for her time in Seadlinnng and Sukeban
Source: “Riko Kaiju”, English Wikipedia (CC BY-SA 4.0), excerpt
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