The aim of this article is to determine the sociodemographic and psychological characteristics (e.g., sex, marital status, work status, age, age of losing the father, seeking psychological help, consumption of medications, degree of anxiety and depression, temperament prone to anger) through which one can predict anger as a personality trait in adulthood, as well as establish an overall anger expression index. The study comprised 155 persons of both sexes whose fathers had passed away due to civil causes (e.g., sudden death caused by illness, traffic accidents, and other accidents) or war activities. The results confirmed that psychological characteristics and developmental age are significant predictors of the development of anger as a personality trait.