Wishes unrealised are no more substantial than air.
I imagine she is a witch or magician of some description, selling wishes to suit your needs in an array of forms; liquid, powdered, herbal, incense, what-have-you. I think she has southern European and Levantine parentage.
The wishes she peddles do come true. Just perhaps not always in the way you expect.
Prints of this piece are available via Redbubble.