Nadine Flumberghast is D.W.'s imaginary friend. She portrays D.W.'s conscience, and usually appears when D.W. feels guilty, scared, or angry. She is roughly 4 years old. Both D.W. and Nadine are aware that Nadine is imaginary. However, Kate, Mei-Lin, animals, and other character's imaginary friends can see and communicate with her. One episode shows D.W. with her when she's much older, while another shows that D.W. does not need Nadine as much as she used to. She is a brown squirrel. She has long platinum white blonde hair styled exotically in three pigtails and small buck teeth. She can create imaginary items and they can appear/disappear with magic. Her last name was revealed to be "Flumberghast" in the episode, "Read and Flumberghast".