 Rias reveals to Issei her true identity as a devil and says that as a result of his death at the hands of Raynare, she has reincarnated him as a devil, becoming his new master in the process.Rias is the head of Kuoh Academy's Occult Research school club, where Issei, Rias, and the club members interact with various groups and organizations, some of which are run by devils who compete against them in sanctioned combat matches called Rating Games, where the characters have been assigned positions akin to chess pieces.Rias has received mostly positive critical reception.