Paradoxically, behind the facade of grandiosity, individuals with NPD often have a fragile self-esteem that is easily bruised. Criticism or perceived slights may lead to intense reactions, including anger, humiliation, or withdrawal narcissist definition, as they struggle to protect their vulnerable self-image. Individuals with NPD may have patterns of enmeshed relationships, where boundaries are poorly defined. They may expect others to fulfill their needs without reciprocation, leading to imbalanced and unhealthy dynamics in relationships.