Shinobu is a girl who lives with Meme in the abandoned building. She appears to be an eight year old girl, but she was originally a beautiful vampire who had lived for more than 500 years. After the events at the end of Koyomi Vamp, she was left in a weakened condition with no powers or traces of her original personality and therefore had to abandon her "Kiss-shot Acerola-orion Heart-under-blade" (キスショット・アセロラオリオン・ハートアンダーブレード?) name. She was named Shinobu by Meme at the beginning of Hitagi Crab, suggesting her kanji name Shinobu (忍), having "heart" (心) under "blade" (刃), matches with her original personality.