Witches are magical beings, taking human form, whom live throughout Oz. Before Dorothy 'turned evil', the witches tended to ignore each other, but they joined forces afterwards in an attempt to restore Oz. The four main witches in the original tale are The Good Witch of the North (Glinda), The Wicked Witch of the West, The Witch of the North (Gert), and The Wicked Witch of the East. Amy arrives after both of the 'Wicked' witches have been killed.