Banshee (folklore)

A Banshee is a death-spirit native to Celtic mythology and was regarded either as a type of fairy or a ghost, regardless of origin a Banshee was always seen as an omen of death and her screaming was said to be heard by those destined to die: appearance wise a Banshee would often resemble a woman, often a hag but sometimes an attractive maiden - according to some Celtic legends every clan had their own specific Banshee that would come to those who were destined to die.

The Banshee is one of Celtic mytholgy's most famous icons and are often used in fiction as antagonists, they are also a fairly standard kind of spectre in Undead armies and organizations despite the fact they were originally considered more akin to fairy folk than true ghosts (perhaps a representation of one of the many death-gods of pre-Christian religions).