Diane, also known as the Serpent Sin of Envy, is one of the main characters in the The Seven Deadly Sins franchise. She is a Giant and member of the Seven Deadly Sins. Her power is Creation. She is also the wife of King. She’s double also the mother of Zach, Zana, Zilian, Mertyl, Nasiens, Sixtus, Belte, Phao, and Tioreh.