The unnamed Librarian is a recurring character in the Hilda TV series, first appearing in "Chapter 6: The Nightmare Spirit". She does not appear in any of the graphic novels, but is exclusive to the animated series and the novelization.
The Librarian appears to be a young female adult. She wears a grey shirt, with white sleeves, grey leggings, and a dark brown skirt with a brown cloak across her shoulders. Her hair is mostly black, but is purple towards the tips. Occasionally, she is seen wearing black/grey headphones attached to a sort of portable media player.
She has the uncanny ability to always know exactly what book people are looking for, even before they can ask her about it. Another quirky thing about her is that she has memorized the entire layout of St. Guglows Cemetery. This last thing she doesn't want to admit however.
- She is shown to speak with a Swedish accent.
- Despite not being credited, Kaisa Hammarlund has identified herself as the voice of the Librarian.
- The only time she is ever seen outside the library is at the end of "Chapter 13: The Black Hound".