Mrs. Lancaster

The "Unknown Elwood City Librarian" is another librarian at the Elwood City Public Library, besides Paige Turner. She mostly had cameo appearances, and only appeared in earlier seasons.

In "Arthur and the Real Mr. Ratburn," she jumped back in fear upon discovering Arthur and Buster hiding in her book cart.

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.

Episode Appearances
''This list is incomplete; please add to it if you know any other appearances.
 * Season 1
 * Arthur and the Real Mr. Ratburn
 * Season 2
 * Arthur Makes a Movie