Elexis Sinclaire is a fictional character in the SiN first-person shooter video game series by Ritual Entertainment. Elexis is the main antagonist character in the cyberpunk-themed SiN series, where she is a mysterious, wealthy and powerful mad scientist who is secretly engaged in organized crime and planning to make a radical artificial evolutionary advance to the human race, and enemy of the protagonist character, private security force commander John R. Blade.