Librarian
The Librarians of the Interdimensional Library were projections of popular fictional characters.
The Librarians' personalities reflected their fictional counterparts, but they had an instinctive knowledge of the Library and where various books or reading rooms might be found, being compelled to act as helpful guides to visitors. Indeed, they were aware of their nature as reconstructions of fictional characters. The Library filtered guests' experience to make sure they did not encounter Librarians based on people who were real in their universe, fictional as they might be elsewhere in the Multiverse.
Known Librarians included Robin Hood, Jack Pumpkinhead, Snow White, the Headless Horseman, the Mad Hatter, Captain Ahab (PROSE: Century Smith and the Time Terror) and Sherlock Holmes. (PROSE: You've Been To Eden, I Perceive)