They’re a fey witch who changes how they look to manipulate and prank and befuddle and seduce others. Their magic is dark, illusory, spooky, and nature based.
Some thoughts:
I Want To Be Evil - Eartha Kitt
Whatever Lola Wants (Lola Gets) - Sarah Vaughan
Trust In Me (Kaa’s song from The Jungle Book)
Curveballs welcome, no wrong answers
For something without many vocals and just atmosphere try Heilung. All of their music feels like you are in a ritual or summoning.
I was gonna recommend Othan by Heilung, it sounds like casting a spell.