The most powerful ghoul in the series, Eto was born to Yoshimura, who would later found Anteiku, and a human woman Ukina. With her mother murdered after looking too closely into the organization known as V, Yoshimura entrusted her to another ghoul named Noro. For unknown reasons she became a bloodthirsty and sadistic Ghoul, acquiring her SSS rank at the age of fourteen, later becoming one of the executives of Aogiri Tree, the largest organization of ghouls in Japan. She has taken a particular interest in Ken Kaneki due to their shared natures as One-Eyed Ghouls.