Yayo is a Puchidol resembling Yayoi Takatsuki from the iDOLM@STER series. She debuted in Puchim@s Season 1 Episode 20, "Birds of a Feather Flock Together," instantly drawn to the sound of a 10 yen coin Takane Shijou accidentally dropped on the street.

Yayo possesses extreme speed, allowing her to instantly reach locations where coins fall upon hearing them. Her hair, especially her pigtails, grows constantly and becomes noticeably longer and bushier during winter. She also exhibits a strong affinity for seeking out bread.

Unlike most Puchidols who live with their corresponding idols, Yayo resides under Takane Shijou's care alongside the Puchidols Koami and Komami.