What is Fayre's Tattoos?

These tattoos symbolize a bond that exists between Rhysand and Fayre, which is a symbolic bridge between their minds. Rhysand describes the bond, saying that Fayre sometimes shields her thoughts from him but sometimes opens her thoughts, “shouting your thoughts across the bridge to me” (56). Fayre learns that she can put up “a wall of adamant” (66) that keeps Rhysand at bay.