Today I showed the piece to a friend of mine.
He was sure that the depicted figure is
Isis /
Nemesis!
She holds a basket in her left hand and plucks her dress with her right hand. In front of her feet is a wheel (no animal).
Well, when I look closely, I really can imagine the wheel with its spokes. It´s not very clear on the photo.
Well, maybe that´s the solution of the riddle.