The Witches: The Three Witches (Weird Sisters or Wayward Sisters) are characters in William Shakespeare's play Macbeth. The witches eventually lead Macbeth to his demise, the three witches represent evil, darkness, chaos, and conflict, while their role is as agents and witnesses.
At a banquet, Macbeth is haunted by visions of Banquo's ghost in front of all his guests. Macbeth visits the witches and they tell him - the only person he needs to beware of is Macduff, no one a woman has given birth to can harm him and he won't be defeated until Birnam Wood moves.
The Witches' appearance at the start of the play in the middle of a thunderstorm (apparently of their own creation) sets the tone for what is to follow. As well as predicting the future, controlling the weather and casting evil spells, they also discuss the wicked acts they carry out against ordinary men and women.
The supernatural appears to the audience in many varied forms - not only does a ghost appear but also a floating dagger, witches, and prophetic apparitions make appearances.