Nyssa has long black hair and dark eyes. She is stoic and cold-blooded: as long as she is killing, she has a ruthless, unstoppable side. She is often very difficult and stubborn. While she has a warm and kind-hearted side, she only shows it to those she cares about. She is also extremely furious at any perceived betrayal. While she obviously does not kill those she cares about, she is not above kidnapping their loved ones as payback and holding them hostage.