Ikusamonogatari

戦場ヶ原ひたぎ

In an accidental encounter with Koyomi Araragi, her closely kept secret is exposed, and triggers a life-changing experience. In the course of the series, she receives the nickname Gahara and uses the alias Senshougahara.

Bio from Fandom, licensed CC BY-SA

忍野忍

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 (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, Kisushotto Aseroraorion Hātoandāburēdo). She now takes the form of an eight-year-old girl with another new name after losing most of her powers.

Bio from Fandom, licensed CC BY-SA

阿良々木暦

Koyomi is the narrator of all First Season and Final Season arcs as well as two from Second Season, four from Off Season, and three from Monster Season. He is the titular protagonist of two main arcs: Koyomi Vamp and Koyomi Reverse, as well as the twelve short stories of Koyomimonogatari. He is also the titular protagonist of two minor arcs: Koyomi History and Koyomi Dictionary.

Bio from Fandom, licensed CC BY-SA

羽川翼

She was bewitched by an oddity on the first day of Golden Week, giving birth to her "alternate self" called Black Hanekawa, and for some time was responsible for a series of attacks on various people in town.

Bio from Fandom, licensed CC BY-SA

八九寺真宵

She is the titular protagonist of five main arcs: Mayoi Snail (Mayoi Mai Mai), Mayoi Jiangshi, Mayoi Hell, Mayoi Snail, and Mayoi Snake, and seven minor arcs: Mayoi Room, Mayoi Castle, Mayoi Name, Mayoi Ghost, Mayoi Escargot, Mayoi Heaven and Mayoi Welcome.

Bio from Fandom, licensed CC BY-SA

神原駿河

It's revealed in Nisemonogatari by Deishuu Kaiki (and thought by Koyomi) that her mother's maiden name was Gaen. It's also revealed in Koimonogatari that her mother's name is Tooe Gaen. In Nekomonogatari White, it is also revealed that she used to be called Suruga Gaen.

Bio from Fandom, licensed CC BY-SA

阿良々木火憐

She is a self-proclaimed "hero of justice" who often imitates the personality and quirks of various characters from tokusatsu series. Despite this, she is completely uninvolved with the supernatural, until she becomes victim to a certain oddity.

Bio from Fandom, licensed CC BY-SA

老倉育

臥煙伊豆湖

甲賀葛