The Sidhe, often referred to as fairies, are mythical beings from Irish and Scottish folklore. They are typically depicted as beautiful, ethereal creatures associated with nature and the supernatural. The Sidhe are believed to inhabit a parallel world, often residing in mounds or hills known as fairy mounds. In folklore, the Sidhe are known for their magical abilities and can be both benevolent and malevolent. They are often linked to the Tuatha Dé Danann, an ancient race of gods and heroes in Irish mythology. Encounters with the Sidhe are said to bring both blessings and mischief, making them a complex part of Celtic mythology.