At first, Diaz is arrogant and conceited, but he is somewhat humbled after his match with Japan and duel with Tsubasa Ozora. Diaz is very talented and has been deemed to be the next generation superstar of Argentinian Football, even being compared to Diego Maradona, even as nicknamed as "Maradona II". Because of their talents and similarities, he has developed a rivalry with Tsubasa of Japan.