Shinobu Oshino is a mysterious vampire girl who acts as Meme Oshino's companion in the ruins of Eikou Cram School. Later in the series, she resides in Koyomi Araragi's shadow during the day. She was formerly a human child princess named Rola (likely meant to be Laura, Lola, or Lora in English, though it may reference the name Acerola) 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. She is the titular protagonist of five main arcs: Shinobu Time, Shinobu Mail, Acerola Bon Appétit, Shinobu Mastered and Shinobu Suicide, and four minor arcs: Shinobu House, Shinobu Science, Shinobu Figure, and Princess Beauty. Shinobu is a young female with yellow eyes, pointy ears, sharp fangs, and long blond hair which curls outward at the end. During the course of the series, she takes on several changes in appearance depending on how much of her vampire powers she possesses. Through most of the series, she assumes a younger form as an 8 year old. She wears a loose dress and a pair of sandals, with an aviator hat as an accessory in Bakemonogatari. As demonstrated in Nisemonogatari, she can suck blood to become older; she appears as a girl in her adolescent years, tying her hair into a ponytail and wearing a black camisole inside a purple jacket, a black skirt and black hosiery. In Kizumonogatari, obtaining her stolen body parts causes her to age, along with gradually transforming her clothes into an appearance similar to her adult form. Her true form as Kiss-Shot depicts a woman in her late 20's wearing a red and black dress. After losing most of her vampire powers, Shinobu falls into a long period of stupor. She is frequently seen in Oshino's place with her hands tucking her knees in, her face always in an emotionless state. She often spends most of the day in one spot, doing mostly nothing with a bitter expression. Shinobu also does not talk to anyone, but she is familiar with Koyomi Araragi and Meme Oshino, and would follow requests from either of them. Later she reverts back to her brighter personality after "reconciling" with Koyomi. She is rather talkative, and often asserts her superiority through her archaic speech. She mostly plays with Koyomi's tendency to act as the follower between the two. Sometime after Koyomi Vamp, she appears to find a liking to Mister Donuts and they become her obsession. She refers to herself using "washi", which is often used in fictional settings to represent characters of old age. Shinobu holds affection for Koyomi stemming from him saving her in Koyomi Vamp. She is seen to show jealousy if he spends too much time around other girls or gets too close to those she does not like, notably Nadeko Sengoku. She is shown to be touched by Koyomi being willing to live and die with her, but as called out by Suruga Kanbaru, is initially unwilling to openly return the sentiment until months later in Ougi Dark. When her first minion Seishirou resurfaces, she is concerned that she might choose to return to Seishirou over Koyomi, still having some affection for him, but admits in the end that she wants to stay with Koyomi. Her liking for Koyomi leads to her desiring to restore their master-servant bond whenever it is broken, despite it restricting her abilities and movements. Due to being around Meme for many hours while performing her silent treatment, she's obtained a bit of knowledge about different types of oddities, and often helps out Araragi in his time of need, but she still remains as no expert. Shinobu very rarely refers to anyone by name, with Koyomi showing surprise that she called Tsukihi by hers in Tsukihi Phoenix. Instead she refers to most people by nicknames, such as calling Hitagi "tsundere girl".