The Armed Librarians are responsible for maintaining the Bantorra Library, a vast collection of books containing the memories and pasts of deceased individuals. These individuals are stored in the library as physical tomes, and reading a book allows the reader to access the person's thoughts and experiences. The Armed Librarians possess psychic abilities, which they use to protect the library from external threats, particularly from the Sindeki Kyoudan, a powerful and secretive organization with its own agenda.