Some legends have it that she is the ghost of a young lady so brutally murdered that she now guards and watches over families and loved ones, warning them of imminent death.
The scream is seen as a strong sound wave capable of throwing people and objects short distances.
However, Banshee does not need to emit a full scream for their voice to affect their environment; simply speaking in a highly emotional state, regardless of the volume and pitch, can cause objects to shake and disorient people around them, especially if said Banshee is powerful or experienced enough.
A disembodied spirit, a banshee may also appear in any forms from a beautiful woman wearing a veil or a pale one in a white or silver dress and long flowing red or silver hair.
The absence of any kind of divination can also give a Banshee some idea of what is going on, such as when Lydia was able to determine that the Turners were not dead due to the fact that she was unable to divine anything from touching their car's steering wheel.