Similarity between media character and viewer is an important predictor of parasocial interactions. Thereby, similarities are often limited to single characteristics or to the similarities viewers perceive between themselves and characters. In Study I, similarity is expanded to sociodemographic similarities with age, gender, job, relationship, and living situation. Psychological similarities are considered with the Big Five personality traits, loneliness, and self-esteem. In Study II, objective similarities are compared to viewer-perceived similarities. Both studies employ a multimethod design with field studies using tracking data, surveys, and content analysis. With the content analysis, characters’ characteristics can be indicated independent from the viewers to assess a more objective similarity. In these settings, parasocial interactions increased with similarities in extraversion and perceived Big Five traits and decreased with similarities in age and consciousness. The other assessed similarity types did not influence parasocial interactions.