Demon Slayer OC Name Generator

Demon Slayer is set in Taisho-era Japan (1912-1926), and its character names reflect that. Given names are old-fashioned and often three or four syllables long: Tanjiro, Kyojuro, Zenitsu, Inosuke, Sanemi, Muichiro, Gyomei, Obanai. Female names lean short and floral or seasonal, like Nezuko, Shinobu, Mitsuri, Kanao and Kanae. Surnames are where the series really shows off. Instead of everyday names like Sato or Suzuki, Koyoharu Gotouge chose rare, image-rich surnames whose kanji hint at the character: Kamado means furnace, Rengoku means purgatory, Kocho contains the character for butterfly, Tomioka evokes a wealthy hill, and Ubuyashiki suggests a birthing house.

A convincing Demon Slayer OC name follows the same recipe: pair a period-appropriate given name with a striking, uncommon surname that carries a visual or elemental meaning tied to the character's Breathing Style, backstory or personality. Water users suit surnames built from mizu, kawa or nami; flame or thunder users from hi, homura, kaminari or ikazuchi. Demons work differently. Most Twelve Kizuki go by a single name, often borrowed from Buddhist or yokai vocabulary (Akaza, Doma, Kokushibo, Enmu, Gyokko, Hantengu, Nakime, Rui), and many keep the name they were given as humans only in flashbacks.

The list above gives you slayer-style full names in Western order (given name first) alongside single-word demon names drawn from yokai lore, so you can name a Hashira, a lower-rank Corps member, or an Upper Moon original character without breaking the setting.