Beatrix Kiddo, A.K.A. Black Mamba, Vernita Green, A.K.A. Copperhead, Budd, A.K.A. Sidewinder, Elle Driver, A.K.A. California Mountain Snake, Along with O-Ren Ishii, A.K.A. Cottonmouth - These four killers made up The Deadly Viper Assassination Squad. Commanded by the Snake Charmer, Bill, the vipers turned on Beatrix and left her for dead. After years in a coma, she will have vengeance on her old comrades.