| Koyomi Araragi | |
|---|---|
| Monogatari character | |
 Promotional illustration of Koyomi Araragi | |
| First appearance | Bakemonogatari (2006) |
| Created by | Nisio Isin |
| Designed by | Vofan |
| Voiced by |
|
| In-universe information | |
| Family | Unnamed father Unnamed mother Karen Araragi (younger sister) Tsukihi Araragi (younger sister) Hitagi Senjougahara (wife) |
Koyomi Araragi (Japanese: 阿良々木 暦, Hepburn: Araragi Koyomi) is the protagonist of Nisio Isin's light novel series Monogatari. Araragi is a third-year high school student who became part vampire after sharing his blood with Shinobu Oshino. During the story, Araragi finds himself helping girls involved with a variety of apparitions, ghosts, beasts, spirits, and other supernatural phenomena, which often serve as proxies for their emotional and mental issues. While most of the narrative focuses on his multiple relationships and encounters, the series often centers on his own personal life as it tackles his origins as a vampire, most notably the Kizumonogatari prequel story.
Araragi was written by Nisio Isin as the main narrator of the series who often dealt other female characters in large discussions. However, Isin revised early manuscripts and rewrote Araragi as a better person and developed a relationship with Hitagi Senjougahara as a romantic couple. In the anime television series and film adaptations, Araragi was voiced by Hiroshi Kamiya who found the character hard to emulate as a result of his multiple narrations, monologues and interactions.
Araragi was popular for several years in polls involving characters and relationships. He has been praised for his role in the story as well as his romantic relationship with Senjougahara which remained appealing in the novels despite the large amount of romantic interests the character has. However, he was often criticized for his childish demeanor with younger characters, most notably in Nisemonogatari, which would scare general audiences.