A philosopher who was captured from the wild when young and sent to the zoo. After the zoo sold him to a menagerie, an old Jewish man bought him and could communicate with him through his mind. Ishmael teaches captivity to the unnamed narrator.
The Librarian appeared in the first novel of the series, The Colour of Magic, and was transformed into an orang-utan in The Light Fantastic as the Octavo fired a beam of magic upwards. On discovering that being an orang-utan had certain advantages for a librarian - he can climb up to high shelves, for example - he refused to be transformed back into a human and has remained an orang-utan ever since. The other wizards have gradually become used to the situation, to the extent that, from Night Watch: 'if someone ever reported that there was an orang-utan in the Library, the wizards would probably go and ask the Librarian if he'd seen it'.
A giant movie monster resembling a gorilla, that has appeared in several movies since 1933. These include the groundbreaking 1933 movie, the film remakes of 1976 and 2005, as well as various sequels of the first two films. The character has become one of the world's most famous movie icons and, as such, has transcended the medium.