So this tailed creature is a hulder. A creature from nordic folklore said to lure people into the forest. She is supposed to have a hole in her back but you wouldn't be able to see it from the front f course. Now there are various stories on where she eventually takes you so if you are interested I suggest you do some research. What I was told as a child was that she would take you to the "underworld" where hulder and other creatures live.