Sona Sitri was the heiress of the Sitri Clan, taking the position since her older sister, Serafall Leviathan, who became one of the Four Great Satans. As such, she is the youngest daughter of Lord Sitri and Lady Sitri. She is a first-year college student at Kuoh Academy, the former President of Kuoh Academy's Student Council, and a childhood friend and rival of Rias Gremory. Her alias at Kuoh Academy is Souna Shitori, and she is the third most popular girl at the Academy, behind Rias and Akeno 