The sister perpetuates the stereotype of the evil, mysterious and totally selfish powerful Asian woman like Fu Manchu’s daughter in Sax Rohmer books and movies. And the villain finally killed by Uma Thurman in Kill Bill 2.
Interesting plot of a 1936 Sax Rohmer novel:
President Fu Manchu.
“Fu-Manchu journeys to the United States for the first time, and is the power behind a “League of Good Americans” candidate for the presidency. From Niagara Falls to the catacombs of NY’s Chinatown, Nayland Smith and federal agent Mark Hepburn seek to stop the Devil Doctor and his plan to assassinate a presidential candidate – 30 years before The Manchurian Candidate!”