جن (Spirit) refers to supernatural beings in Islamic theology, often described as created from smokeless fire. They possess free will, similar to humans, and can be good, evil, or neutral. The concept of جن is mentioned in the Quran, where they are depicted as living in a parallel world to humans. جن are believed to have the ability to influence human thoughts and actions, which is why they are often associated with possession or mischief. They can be invisible but may take various forms. In folklore, جن are often linked to magical practices and are a significant part of Arabian mythology.