Having not been able to show a friendly rivalry between Jonathan and Dio Brando in Part 1, Araki introduced Caesar Zeppeli to present a more positive friendly rivalry between him and Joseph since "Weekly Shōnen Jump" is a "shōnen" magazine. Because Joseph and Caesar both inherited the bloodlines of their grandfathers, the author wanted to connect their individual Hamon abilities to their last names. Thus he gave Joseph a "trickster" style, and Caesar the seemingly fleeting-bubbles as a "representation of his fate and the burden he is carrying." Having never been a fan of the main character receiving some unbeatable ability, Araki enjoys giving characters weapons with faults and having them make up for it with strategy. He noted that the spherical shape of the bubbles allowed him to morph them into discs or use them as lenses. The author also stated that these "spheres" were inherited by both Gyro Zeppeli in "Steel Ball Run" and Josuke Higashikata in "JoJolion".