Rias Gremory

A demon from the Gremory clan, one of the highest-ranking demon families, Rias initially saves Issei after he was attacked by a fallen angel, Raynare. Issei wakes up the next morning, thinking that the events that occurred were just a dream, but then notices Rias naked in his room. Rias reveals her true identity as a demon to Issei and tells him that, as a result of his death at the hands of Raynare, she has reincarnated him as a demon, 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 demons who compete against them in sanctioned matches called Ranking Games. . , where characters have been assigned positions similar to chess pieces.