Nadine Flumberghast

In the series Arthur, Nadine is D.W.'s imaginary friend. She is an anthropomorphic squirrel with white hair (though she is not old) and wears a blue dress.

In contrast to D.W., Nadine is calm and soft-spoken. She often gives D.W. advice, though she rarely takes it, and she only appears when D.W. is alone. Judging by her size, her age is about the same as D.W.'s.