I would say that the most obvious use of figurative language here is personification. The star, which is obviously not a real person, is spoken about as if it were a human, which is called personification. Any time an animal, inanimate object, or other object is given human attributes, personification is being used.
The star in the passage is being referred as "a hunter with a pack on his back" because of the woman's Native American heritage. This is the way that she would have referred to it because it was what she had been taught as a result of oral tradition. In a Native American legend, the star would have been the hunter.