A female spirit in traditional Irish stories whose crying sound tells you that someone in your family is going to die. (Cambridge Dictionary)
A female spirit in Gaelic folklore whose appearance or wailing warns a family that one of them will soon die. (Merriam – Webster)
(in Irish folklore) a spirit in the form of a wailing woman who appears to or is heard by members of a family as a sign that one of them is about to die. (Dictionary.com)
Art station. Banshee.
Banshees are incorporeal undead elf women, known for their unholy screams and the unsettling ability to possess the bodies of their enemies.
Banshee – Wowpedia – Your wiki guide to the World of Warcraft.