While Jupiter is normally calm and easygoing, he can sometimes get annoyed and irritated. For instance, he showed annoyance at Saturn’s overprotectiveness of Titan, and was shown quarreling with others for the first time.He is widely considered to be the smartest of the characters. He is often called the Big Brother of the planets by fans. He has sponsored the show's Patreon, thus making him the second character to break the fourth wall.