Byakko
About
A mysterious woman who is looking for the power of immortality. She is later revealed to be Seiju's "Aya". When she was still young her older sister, Yoko, left her to become Shien's "Aya". This incident depressed her a lot so she decided to join Seiju, thus, becoming his doll. Source: Wikipedia
Voice Actors
Horie, Yui
Japanese