The Librarian

The Librarian is an ancient magical being whose sole purpose is to protect and care for Magic School's Secret Library. He only appears to people when his assistance is requested by a visitor of the library.

Season 4
In A Discovery of Witches, he appears to Prue when she asks the library for help in finding information about the Red Witch. He helps her learn about the red and white witch and also spends time with Prue's newborn daughter, Christina.

Physical Appearance
Tall and handsome, he appears only in an expensive suit and always has a smile to offer.

Notes and Trivia

 * He was created by the Elders to maintain the library;
 * He tells Prue to think of him as an index for a book;
 * He has never left the library, as that is his only purpose and place in the world;