A jinni (feminine form jinniyah) is a certain type of demon or spirit in Middle Eastern folklore.
They are spoken of as a being composed of flame and air, and often taking human form. They also live in inanimate objects, such as lamps, rings, or carpets. They pass from person to person as possessions.
They perform certain tasks or grant certain wishes, oftentimes only three wishes. The wish recipient does not always receive exactly what they want and, instead, may often be granted a different interpretation of what they ask for, if they are not careful to be specific enough upon declaring their wish.
There are several classes of jinni, both good and evil, including the Ifrit class. All jinni carry the Mark of the Jinn.
In the 15th century, a young woman in France discovered an Ifrit in a rug given to her by an old Moor. She became a jinniyah when the Ifrit misinterpreted her wish. For the next five hundred years, she granted wishes to several people, including Benito Mussolini, Richard Nixon and Fox Mulder, before Mulder – who called her "Jenn" – turned her into a human. (TXF: "Je Souhaite")