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Librarian Uniqua is the owner of a library in Viejo, California. She loves books and uses a black checkmark stamp to check them out to other readers. She assumes her secret identity, the Masked Retriever, to retrieve overdue books.
Librarian Uniqua is mostly pink. She wears a brown wig, a pair of pink-rimmed glasses, and a light purple dress with white cuffs.
Uniqua has played Librarian Uniqua in one episode of The Backyardigans: "The Masked Retriever" from season three.