Caesar Zeppeli is a supporting character in Battle Tendency, the second part of Hirohiko Araki's JoJo's Bizarre Adventure manga and anime. As an Italian Hamon user allied with Joseph Joestar, his expressive delivery fits the series' dramatic style. Clips of characters saying mamma mia, a classic Italian exclamation of surprise, circulate widely on soundboards and in fan edits. The Caesar version stays popular with anime fans who want a short, recognisable reaction that signals disbelief without needing setup or explanation.