Celica Ayatsuki Mercury

The younger sister of Nine, and aunt of Kokonoe. Her name is Caelica and her role is further explained in BlazBlue:Phase 0.

Information
Caelica A. Mercury was Nine's younger sister, Jubei's sister-in-law, and Kokonoe's aunt. She had brown hair in her youth, and was naturally gifted in the use of healing magic. She was stubborn and unable to ignore those who are in need. After the Dark War, she watched over the Black Beast's remains and built a church, waiting for a chance to reunite with Ragna. She later was the foster parent of Ragna, Jin, and Saya, and was killed by Terumi Yuuki in 2192.