The purpose was to contribute to a better understanding of the personality structure and dynamics of paranoia. In study 1, 29 paranoid patients and three control groups (30 schizophrenics, 27 depressives, and 64 healthy subjects) were administered the Cognitive Orientation (CO) Questionnaire of Paranoia, which included beliefs of four types (goals, norms, about self, and general) referring to 44 themes (e.g. masculinity, strength). Discriminant analyses (based on longer and shorter versions of the questionnaire) showed that the four belief types enabled significant discrimination among the four groups and that there is a CO based on themes and conflicts characteristic for paranoia. In Study 2, 31 paranoids and 31 healthy controls were administered the Meaning Test which yielded prevalidated scores for 124 personality traits. The results showed that paranoids have a clear-cut personality profile, with traits in clinical (e.g. obsessive), interpersonal (e.g. extravert, leadership), emotional, cognitive, and other domains. The findings are integrated and the convergences between the behavioral tendencies and personality traits specified, in an attempt to identify the major features of the paranoid, including potential dangers and therapeutic chances.