The source offers an extensive examination of the banshee, a supernatural entity central to Irish mythology known for her mournful wail that foretells death. The text explores the origins of the banshee from ancient Celtic traditions, connecting her to the Aos Sí (fairy folk) and the ritual of keening (professional mourning). Furthermore, the source details the banshee’s varying characteristics, such as her contrasting appearances and association with specific noble Irish families. Finally, it addresses the banshee's profound cultural significance in literature, art, and modern popular culture, noting how her figure has evolved into a global symbol of grief and fate.