Molly MacDonald is close friends with Binky, 9 years old. She is a white rabbit, one of the antagonist, a senior member of the Tough Customers, and the sister of James MacDonald. She is good at giving advice, but dislikes the fact that everybody comes to her for it. Molly has a maroon hair that completely covers her eyes (they can be briefly seen in several episodes), giving her a rebellious appearance. She has a younger brother named James who is in D.W.'s preschool class. She became friends with D.W. and Arthur eventually, but both sides have agreed to keep this secret from their friends.
but in an episode her friends find out that arthur and her have been hanging out.