Fufu is a male ferret, approximately five years old, residing in Watermill Village. He completes the central trio alongside Pico and Tocho. Physically weak and somewhat frail compared to his companions, Fufu wears a light blue t-shirt and dark blue dungarees, fitting a color-coded design.

His personality is gentle and timid, contrasting with his more adventurous friends. Despite his physical limitations, Fufu compensates with sharp intellect. His mind processes information rapidly, allowing him to formulate strategies and solutions during the group's quests. This cognitive agility enables him to contribute crucial plans when confronting challenges.

Fufu actively joins the primary mission to locate and retrieve scattered mystical scales for Aesop, a giant flying fish discovered by the trio in a hidden lake beneath the mountains. His role within the group frequently involves applying his problem-solving skills to navigate obstacles encountered on their journey across various environments.