Mary Roche was originally an exotic dancer at a Paris night club. She was known as "Black Venus" because of her beauty and the black curve-hugging bodysuit. She was engaged to Jean Cartier, a Parisian lawyer. Unfortunately for Jean, her dancing captured the attention of Yamato, an attache to the Japanese embassy in Paris. Upon learning of Jean's existence, he arranged to have him assassinated. When Mary discovered what happened she swore vengeance on Yomata and the Japanese people in general.