Fuyunyan is a blue cat Yo-kai featuring a white chest, muzzle, and paw tips, complemented by a dull pink nose and inner ears. A distinct white scar marks the center of his forehead. His attire consists of a dull gray belt displaying a swirled sphere and a long red cloth worn as a cloak.

Personality-wise, Fuyunyan exhibits a strong sense of righteousness, frequently acting to uphold what is right and defend his friends. He demonstrates initial patience but may lose focus on tasks over time. His behavior occasionally displays childlike qualities, such as creating sound effects when introducing items like the "Rewind Stone." Fuyunyan feels embarrassment about transforming into Dekanyan and often approaches ordinary activities in unconventional ways.

Regarding abilities, Fuyunyan possesses the power of flight. He projects energy balls and channels energy to coat his fists during combat. Under specific conditions, such as when allies like Keita and Keizou combine the strength of other Yo-kai, Fuyunyan transforms into Darknyan—a grittier, more powerful version of himself.

Within the film "Jibanyan vs. Komasan - The Big Amazing Battle, Nyan," Fuyunyan participates in an investigation alongside Komasan's sister Komami, who operates as a spy. Together, they uncover a Yo-kai's involvement in a conspiracy linked to the disappearance of beloved treats like Chocobars and soft-serve ice cream. This conspiracy also connects to a larger crisis surrounding Lord Enma, the most powerful entity in the Yo-kai World. Fuyunyan's role involves collaborative efforts to expose the mastermind behind these incidents.