I developed the look of three different kinds of witches in these tips:

Witches For The Waking Prince
witches-for-the-waking-prince

Witches From Head To Toe
witches-from-head-to-toe

From there, I made up three original warty characters.  I just exaggerated or modified their features.

For example, I made my Halloween-style witch quite generously proportioned and I gave her some extremely curly shoes.

The kingdom needs even more of these bad-tempered ladies.  The possibilities are endless!  Ha ha!