Throughout the story Feyre is forced to shed her feminine side and forced to adapt a more masculine role. This happens multiple times throughout the series and is important to note that she often shifts back and forth between the masculine and feminine. To give an example of what it is I am referring to; once Feyre's father runs out of money and they move to the hovel where the story begins, Feyre is forced to give up her life of studying and being a normal girl and must assume the role of the protector for her family. In the world today this is seen as a masculine identity. She goes out and hunts and provides for her family. This is the first example of Duality that I noticed. I am a college student writing on this topic and would appreciate if anyone has anything to say or would like to discuss this topic in more detail.