Izanami

""All citizens. Upon the name of 'Hades: Izanami'... My last gift. Let me present to you: 'Death.'""

Hades: Izanami (冥王・イザナミ), formerly the Imperator of the Novus Orbis Librarium, is the Drive of The Origin and the embodiment of death. She is the former wielder of the Nox Nyctores - Gigant: Take-Mikazuchi and possesses the body of Saya. Her goal is to bring about Doomsday.

Izanami first appeared at the climax of BlazBlue: Continuum Shift and became playable in BlazBlue: Central Fiction as the final boss of Arcade's Act II.

Personality
"Calm, collected, and absolutely ruthless. She regards all living things as but insects crawling on the ground, and believes the duty of Hades: Izanami is to return the world to nothingness. She occasionally calls Ragna "Brother," but whether that is truly a reflection of Saya's thoughts or not remains unknown."

Imperator
''Officially, the Imperator Librarius. She's the highest ranking official in the Novus Orbis Librarium's pyramid. She is, however, the same person as Ragna and Jin's younger sister, Saya.''

''It would not be an exaggeration to that the entire NOL exists to serve her agenda. Directly below her command is a group of 12 families, known as the Duodecim, whose strength is immense and unknown.''

''In the episode of Continuum Shift, she successfully awakens the Takamagahara with Hazama and Relius' help. She now has her sights set on the Master Unit's destruction.''

Hades: Izanami
''The former Imperator, highest ranking political official and commander of the Novus Orbis Librarium. She is the ruler of death. Her goal, to bring upon the day of reckoning, and return the world to nothing.''

''Her vessel is Ragna and Jin's younger sister, Saya. Occasionally, Saya's personality will surface.''

However, it is still unclear whether that is because the blend was over or underdone.