Rize Kamishiro was a ghoul and the foster daughter of Matasaka Kamishiro. Born into the Washuu Clan, Rize was the illegitimate daughter of former CCG chairman Tsuneyoshi Washuu, where, as a child, she escaped from her clan and organization V. She was known under her nickname Binge Eater Due to her eating habits, Rize was a threat to most ghouls in various wards in Tokyo.