Go! Occult Research Club!.Issei transfers his boosted powers to Rias, but both Rias and Akeno are overpowered by Kokabiel. Realizing Akeno is the daughter of the Fallen Angel Cadre, Baraqiel, Kokabiel mocks Rias saying that she has a habit of taking in weird people like her brother, infuriating Issei. Kiba, Xenovia and Koneko attack Kokabiel to buy time for Issei to boost his powers, but Kokabiel overpowers them. He then reveals that in the previous Great War, the Four Devil Kings and God were killed, much to Xenovia and Asia's horror. Despite this, Issei states his dream of becoming a Harem King and attacks Kokabiel, reigniting his friends' fighting spirit. However, the barrier surrounding the school field is destroyed by the stranger, calling himself the White Dragon Emperor Albion. He ultimately defeats Kokabiel and negates the self destruct spell on the school, before taking Kokabiel and Freed away from the field. With Kokabiel gone, the academy's student council repairs the school while Kiba vows once more to serve Rias along with her other servants. In the aftermath, Xenovia is reincarnated as a Devil as Rias's Knight after being declared a heretic by the Church and joins the Occult Research Club before reconciling with Asia. Issei later plays a video game with his client, who reveals himself to be Fallen Angel Leader Azazel.