|"Unnamed Librarian" is not an official name.|
|Hair color||Dark brown|
|Cartoon debut||"Arthur and the Real Mr. Ratburn"|
The librarian also appeared in "Meek for a Week," where she was shown as a resident of Westboro Apartments. She is seen as one of the residents who come to the roof to complain about Francine's loud drumming. In this appearance, she is in her pajamas.
She has a speaking role in "Arthur Makes a Movie" where she was locked out of the library's computer network system. Neither she nor Miss Turner could regain control because The Brain accidentally hacked into the system, which included access to the electrical circuitry.
The librarian also bears a resemblance to Becky.