MY GIRLS <3 I am butting in because I love all of the Archeron-sisters to bits. Nesta protecting Elain and not Feyre makes perfect sense to me. My oldest sister is more protective over one of my middle sisters than she is me, because she knows I can take care of myself and that I am a little, "tougher" than my softer middle sister. Just because you're the youngest does not equal you being in need of protection. And your older sister usually knows you well enough to feel this.