Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sadako Yamamura is the antagonist in Koji Suzuki''s novel Ring and the 1998 film adaptation. She returns as the antagonist in Rasen, is the protagonist in Ring 0: Birthday, and appears in the Korean and American remakes of the Ring cycle films. In the original novel, Sadako is a hermaphrodite. In both the novels and movies, it is hinted that she is the daughter of some oceanic based entity, making her a quasi-oceanic demigod. Her name combines the Japanese words for "chaste" (sada) and "child" (ko).