Fictional Fiend is a term used to describe two popular characters in literature and film, Dr. Jekyll and Mr. Hyde and the OGRE. Dr. Jekyll and Mr. Hyde is a novella written by Robert Louis Stevenson in 1886, which tells the story of a scientist who creates a potion that turns him into a monstrous alter ego. The OGRE is a character from fairy tales and folklore, usually depicted as a large, ugly, and cruel monster. Both characters are often used as metaphors for the duality of human nature.