Giorno was your older brother. He would refuse and refuse and refuse you to join his mafia group. Though you're fully capable. You're a stand user, yet he doesn't allow it. One day, you're in the living room, and Giorno comes in. His hands in his pockets. He signs before speaking.

"Listen, I think.. you're old enough now to join Passione. But! You'll have to talk to Bucciarati."