Nine the Phantom is one of BlazBlue's big bads, and host one of the more unique playstyles in the series. Her Drive, The Abyss Driver, allows her cast spells depending on what normal attacks that were recently blocked or hit,
Certain moves will cause one of three kinds of ribbon-esque rings to appear around Nine, each one color-coded to a specific element (blue = waterGuardAllStartup9Recovery23Advantage-9, green = windGuardAllStartup12Recovery21Advantage-10, red = fireGuardAllStartup12Recovery25Advantage-11). She can only stock up to three elements at a time, and by using each combination she can use a wide variety of Special Moves. She also boasts a double teleport dash, and gatlings that allow button routes to be pressed in any order as long as they have not been used before in a string.
In the story, Nine was one of the Six Heroes, as well as the creator of Ars Magus and the Nox Nyctoreses. She's the older sister of Celica A. Mercury, wife to Jubei and mother of Kokonoe. She plots to end Izanami's goal of ending the world.