Shinobu Oshino is a 600 years old mysterious vampire girl, she resides in Koyomi Araragi's shadow during the day and comes out at night. She was formerly a human princess named Laura who was cursed into causing anyone in proximity to her to commit suicide. She then took the name of Acerola before meeting a purebred vampire that turned her into a powerful vampire named Kiss-Shot Acerola-Orion Heart-Under-Blade. She now takes the form of an eight-year-old girl with another new name after losing most of her powers.
