She is an elderly female monster who works at Monsters University's school library. The librarian resembles a tiny gray cephalopod monster with eight tentacles, gray hair, and wears a black dress and horn-rimmed glasses. Although she seems to be small and inoffensive when sitting at her desk, she turns out to be a lumbering giant about the same size as the library in which she works when she stands. She hates noises inside the library. If she catches any monster being too loud, she will attack the offending party with her tentacles, and anyone who gets caught will be tossed out of the library and into a river facing the entrance. Whenever she gets angry, the Librarian will yell "Quiet!" in a soft, whispery voice.