I divided my mother's siblings into two groups, the angelic souls who were generous to a fault, and those who I called "shrivelled souls". I later learned that the "shrivelled souls" suffered from Narcissistic Personality Disorder.
Things that I learned early about the "shrivelled souls" is that sometimes they would recall a slight that had occurred more than a decade before and would work themselves into a frenzy over it as if it had occurred the day before. They never forgot the slight. Another of the things was the futility of holding a meaningful discussion as to the merits of an argument. Any disagreement with a given point was viewed as a personal attack and responded to with an ad hominem attack.
"Shrivelled souls" lacked generosity and had a need for a proscribed environment where they did not have to confront new things; they would withdraw from the unfamiliar.