|Hair color||Dark brown|
|Book debut||King Arthur|
|Cartoon debut||"The Return of the King"|
Colleen is a rabbit with a brown complexion and Francine's hair. She wears the Glenbrook uniform with a white collared shirt, a dark blue tie, a plaid skirt, a light blue V-neck shirt, and a medium blue jacket bearing the Glenbrook insignia. She also has yellow hair clips like Francine's.