In the context of sport performance, informal leaders are those players that team members choose to follow and from whom everyone awaits solutions in challenging times that occur during training or competitions. Theories about personality describe leaders as having the ability to drive people toward a cause based on the sheer force of their personality. Another important factor influencing sport performance is anxiety. The high level of difficulty, the hard training and competition can be considered causes of the systematic stress, which can influence the behaviour of athletes. Handball is a competitive sport, its spectacularity being given by the dynamic game, with frequent and unexpected changes of situations. The aim of our research was to identify personality traits and anxiety levels which are associated with the scores obtained by the athletes, after performing a sociometric assessment, in terms of reputation. The participants were 30 female handball players, from the School Sports Club no. 6 Bucharest, aged between 14 and 15 years old. The instruments used in our research were: the Five Factor Personality Questionnaire (CP5F) and the Endler Multidimensional Anxiety Scales (EMAS), belonging to the computerised platform of psychological assessment CAS++, designed by Cognitrom. Following the application of Pearson correlation, statistically significant relations were revealed between the results registered by the athletes, for: personality traits, anxiety levels evaluated in different contexts and PSI (preferential status index). The results emphasise specific personality features of the informal leader, which reflect significantly upon social integration of the athletes in the handball team.