Tsukumo Yatsuhashi is a youkai tsukumogami and one of the Prismriver-like sisters in Touhou Project. She is the younger sister of Benben Tsukumo and plays a biwa, giving her a traditional Japanese music theme. Yatsuhashi is portrayed as cheerful, energetic, and somewhat mischievous, often appearing alongside her sister as a duo. In the series, she serves as a stage boss character in Touhou 14.5 and related works, contributing to the franchise’s cast of colorful musical youkai.