The first boss of Passione, Diavolo seeks absolute security and superiority by eliminating all traces of his past, including his daughter, Trish Una, and attempts to retrieve her via manipulating Team Bucciarati through his orders. He and Vinegar Doppio are two souls inhabiting a single body, and while Doppio can only partially manifest the incredibly deadly King Crimson, Diavolo is the Stand's primary User and wields its brutal power in full.