A female undead phantom, typically a selfish, strong-willed spirit that embodied the essence of hideousness. Oftentimes they were the spirits of elven women, whom in life had an evil alignment.

A banshee didn't have a defined shape, but rather a misty form with vague and flowing features that mirrored her former form in life. As time wore on, a banshee became more and more distorted, though was still recognizable as a humanoid.