Board Thread:Character Discussion/@comment-29195016-20160805003445/@comment-25926288-20160805005007

I'd take it like in Oz (or its many variants) that each Cardinal Direction had a good and a bad witch. For example, there was the Good Witch of the North that met Dorothy (not Glinda which the movies get wrong), while Dorothy eventually met Mombi the Wicked Witch of the North.

For Once, it's more of "Wicked Witch" than Wicked Witch of the West being emphasized. She was granted the West, set to represent the western portion of Oz, but she became wicked and then took over all of Oz and just so happened to been given the west (which she deals very little with).