Nieve Powell has experienced three instances of being affected by something that the others in her group were not affected by. In Cross Corners when Scratch was bound, she experienced a moment of enhanced Intuition and sensed a connection being severed between Scratch and something else. Later, on Vultheryol Peak, she discovered that she had less trouble breathing in the high altitude than her companions. In Croatoan when exploring a tunnel in Lucinda's basement that led toward The Scar, Nieve had a moment of weakened Willpower and felt a compulsion to go further down the tunnel, even though there were dangerous monsters in the way. It is not clear yet whether these symptoms are permanent, consistent, or situational.
It is not clear where and when this condition began for Nieve.