Nijifuwatchi has a white fluffy body with pink wings. Her head is shaped like a cloud, and her torso has a dress-like appearance. She has two short fluffy pigtails and curly bangs on her forehead. She has drop-shaped eyes with four eyelashes each and pink cheeks. The top of her head has pink, yellow, and blue stripes on it, which resemble a rainbow. She wears a yellow star-shaped clip on the left side of her head. Nijifuwatchi floats a short distance above the ground.
Nijifuwatchi's name comes from niji (虹), meaning rainbow, and fuwafuwa (フワフワ), an onomatopoeia word for "fluffy" or "floating" (like clouds).
In the Anime
Nijifuwatchi made her first animated appearance in the short film Eiga Tamagotchi: Himitsu no Otodoke Dai Sakusen!, where she helps Mametchi and his friends deliver an egg.