When Giorno joined Passione, he entered into Bucciarati’s team. They were assigned the task of delivering Trish Una to the boss. After discovering that the boss is trying to kill Trish, his daughter, the gang rebelled against the boss. However, despite ultimately killing Diavolo, the boss, many of their members are killed, as Giorno and Mista are the only members of the team that survived.

Correction

Um actually … Fugo is also still alive, though he didn’t join the rebellion against the boss.