Diavolo is a really tall man in his thirties with a lean and semi-muscular build. Diavolo has long hair, with a leopard pattern with various spots that move apart in a zigzag pattern; the bangs are propped up and slightly pushed to the side. In most of his performances, Diavolo has a slightly hunched posture when standing. The most outstanding personality trait is his pride. The biggest personality trait that Diavolo demonstrates is his obsession with erasing any traces of his history.