Narcissism is an interpersonally maladaptive personality style that encompasses a wide spectrum of traits and behavioral patterns that present in different ways, from mild to severe, vulnerable to malignant. What separates a narcissistic person from someone who is self-centered or vain or entitled is the consistency and sheer number of these traits in one person. Just being superficial doesn’t mean someone is narcissistic. It is also looking at the function of these traits—which is to protect the narcissistic person.