Hirumi Hishigata
菱形蛭魅
A student of Seiin High School and Mikihiko's younger sister. She collaborated in her brother's research as a test subject, and became friends with Esther. She lost her life in an accident during the research work.
菱形蛭魅
A student of Seiin High School and Mikihiko's younger sister. She collaborated in her brother's research as a test subject, and became friends with Esther. She lost her life in an accident during the research work.
