Saya

Saya is Jin Kisaragi and Ragna the Bloodedge's sister.

Information
Saya was born with a frail body, and throughout her life was bullied by her brother Jin. Her other brother, Ragna, was much more caring, and spent much time with her. Jin grew jealous of the relationship Ragna and Saya shared, and eventually attempted to kill her. She was kidnapped by Terumi Yuuki, and whether she is alive or dead is currently unknown.

All information on her is received in flashbacks and memories. Noel Vermillion, Lambda-11 and ν-13 are all copies of her, sharing her physical traits and some of her memories, no explanation has been given yet toward the reason for her being their basis.