Giulio Cesare is a blonde-haired male character appearing within "The Familiar of Zero" franchise. He holds a secondary role in both "The Familiar of Zero" and "The Familiar of Zero: Knight of the Twin Moons," while featuring as a minor character in "The Familiar of Zero: 'Rondo' of Princesses." His presence in "Knight of the Twin Moons" is further confirmed through voice actor credits.