緋月 鈴音

Hizuki main family's child and Masakazu's younger sister. Ever since she was born she was raised as Naoto's fiancee, but the two's relationship was more like that of close childhood friends rather than lovers. 
Still, deep inside she loved Naoto and would get very jealous whenever some other woman tried to get closer to him.
Because of the blood of Hizuki's main family, she has extremely strong spirit sense.
One year ago, when she was on the car Masakazu was driving they were involved in an accident and died... or, did she really...?!