A Woodwife, or Moss Maiden from Germanic mythology. They're earth spirits dedicated to protecting the forests and are described as beautiful, petite, finely dressed beings with a hollow, tree-like back, covered by their mossy long hair. She's a featured illustration and myth in my self-published comic "Femme Fatale Vol 2", which is a collection of myths featuring deadly ladies from all over the world. Get your copy here! :)
