The Amanohokosaka Clan are a familial group of exorcists and sorcery users who are descended from the Azure Shrine Maiden. They were charged with defending the Wadatsumi area until they were forced to sell it off to Takamagahara. Once each generation, a daughter of the family inherits the title of Amanohokosaka Shrine Maiden.
After the Azure Shrine Maiden had sealed off the Black Beast in the land of Wadatsumi, her family, the Amanohokosaka, defended the land, guarding it so that the Beast would not be resurrected. Over the many generations, the family eventually forgot their duty.
The Wadatsumi Mass Vanish Incident permanently damaged the Clan as one of their members died and another had their soul taken. As the only way to live after being humiliated by the Magic Guild (due to the fact the Clan are exorcists), the Clan sold the land of Wadatsumi to Takamagahara. The daughter of these two members, Mei Amanohokosaka, would later become the Amanohokosaka Shrine Maiden, and eventually, the leader of the Amanohokosaka Clan.
Five years before the events of the Bloodedge Experience series, Saya Terumi became the newest wielder of the Drive Soul Eater, and slaughtered everyone in the Terumi Clan so that she could inherit the Eye of the Hunter and become it's leader. Before she managed to slay her brother, Naoto Kurogane, Mei stopped her, and had her bound for the next five years until she could no longer manage it. Saya would attempt to hunt down her brother once more since he possesses the Eye of the Hunter.
Many years after the events of the Dark War, Tenjō Amanohokosaka would become the leader of the Novus Orbis Librarium, and would be its Imperator until the coup d'état lead by Hades: Izanami resulted in the Ikaruga Civil War. Tenjō was seemingly murdered by Jin Kisaragi but had his soul sealed within the Nox Nyctores - Phoenix: Rettenjō at the last second. His disciple Bang Shishigami would protect the Nox and attempt to avenge his master; his other disciple, Kagura Mutsuki, would protect his son, Homura Amanohokosaka, and try to have Homura rightfully inherit his position as the new Imperator. At the end of the events of BlazBlue: Chronophantasma, Hades: Izanami retired her position as Imperator, handing it over to Homura since she had no further use of the NOL.
For some reason, both Yūki Terumi and Kiiro Hikagami masquerade their identities using last names from the Amanohokosaka Clan's families. Because the clan are exorcists, they do use charms, such as the Goofball Proximity Surveyor.
Underneath the Amanohokosaka family, there are four other families which are also known as clans:
- The Hajō (破城) Clan.
- The Kagetatsu (影辰) Clan.
- The Hikagami (緋鏡) Clan.
- The Terumi (輝弥) Clan. Naoto Kurogane is its current heir, with Saya Terumi being another member. The Eye of the Hunter determines who is the heir and leader.