Jotaro is introduced as a rough delinquent, but he has a gentle heart and is loyal to those he likes. He is highly perceptive, intelligent, and quick-witted while keeping a perpetually cool, slightly neutral, or disinterested attitude. Jotaro's most noticeable trait is his seemingly aloof nature. He is a quiet individual, often satisfied with expressing himself in short phrases. His bio explains that he thinks anyone can tell his emotions just by looking at him, but they actually cannot.