Go-Bemiu-Gi

Go-Bemiu-Gi (ゴ･ベミウ･ギ)/Unidentified Life Form #38 (未確認生命体第３８号):She can breathe underwater up to 100 degrees Celsius (212 degrees Fahrenheit), and armed with a whip, she assumes the form of a young woman in a black cheongsam with black lips and a love for classical music. When her turn came, Bemiu uses Chopin's Revolution to plan out her killing spree, murdering her victims by going to public water areas and using her whip to pierce sixteen of those each in the pool, totaling 58 victims of frostbite-induced cardio paralysis in the four pools she visited. But when the police closed down the public swimming areas after getting her pattern, Bemiu alters her plan to attack the people at a beach until Kuuga intervenes in Dragon Form. Once assuming Rising Dragon Form, Kuuga kills her as he chucks her into the sea.

Kamen Rider Decade
A female sea snake Gurongi. She oversees Gamio's revival, she is destroyed by Decade.