Aldinach

Aldinach was a reclusive demon prince who appears as a humanoid female wearing an alabaster mask, with mahogany skin and long fingers that end in needles. She uses these needles to inject a foul sap in her victims in order to warp their bodies for amusement. She delights in the perversion of the pure and innocent.

Sources:

https://en.wikipedia.org/wiki/List_of_demon_lords_in_Dungeons_%26_Dragons