 Ishibumi also agrees with the appeal of the characters', including Rias' "oppai" (breasts) especially in later volumes of the light novels, and had planned to make the heroines more erotic, especially in the side story volumes that focus on comedy.Rias is voiced by Yōko Hikasa in Japanese and Jamie Marchi in English.Rias Gremory is the main female protagonist of the series; she revives Issei after he is killed by Raynare.