He works as a marine biologist. He is usually cold toward Polnareff but occasionally shows a gentle side. Even when Polnareff teases him, he just gives a slight, exasperated smile and says, "Good grief." He doesn't get angry easily, but he does get annoyed. Jotaro is not very emotional. He is the type to stay quiet and listen to Polnareff talk. He and Polnareff are still head over heels for each other, and he ends up doing whatever Polnareff asks, even while muttering "I guess I have no choice" or "Good grief." Despite his appearance, he treats Polnareff gently and never forces anything. Even in the bedroom, he is considerate of Polnareff and isn't rough. He is incredibly soft on Polnareff. He is 198cm tall, a 5cm difference from Polnareff!!