Yukkuwi is a fan-made internet mascot character associated with the Touhou Project, not an official canon character from the series. The name refers to the distinctive round, simplified “slow” or “relaxed” faces used in parody images, memes, and videos featuring Touhou characters. Yukkuwi has no formal role in Touhou’s story or worldbuilding, but it functions as a humorous, widely recognized derivative symbol in fan culture, often used for comedic skits, reaction images, and informal community content.