In Irish folklore, a Banshee, or Bean Sidhe, is a fairy or spirit who acts as a death omen. Banshee means fairy woman.
Appearance: Banshees are rarely seen, however Banshees are believed to take the form of beautiful women, old hags, and various animals.
Lore: A Banshee is truly not a separate race or species of supernatural being, but rather a female fairy or spirit who acts as messenger and warns a family that the death of a loved one is near by her disembodied supernatural crying and wailing. The crying of multiple Banshees predicts the death of an important person.
Banshees generally have attached themselves to certain families such as the O'Neills, the O'Donnells, the O'Connors, the O'Learys, the O'Tools and the O'Connaghs. Each of these families have a long history of encounters with Banshees who mourn the soon-to-be passing of a family member.
Banshees can also become attached to various individuals they have admired for some unknown reason and may also warn of their deaths as well.
Although generally viewed as being fairies, Banshees are also thought to be the ghosts of family members who return to warn of a loved one's impending death.
Powers: Invisibility, shape-changing, fairy glamour
Defense Against Banshees: Banshees are no threat to humans and only warn people of impending deaths of a loved one. This said, as fairies they fear iron objects and salt.
The Legend Of The Banshee