Prosciutto

Antagonist from Part V: Vento Aureo. He belongs to the defected assassination faction of the Italian mafia gang, Passione, called La Squadra Di Esecuzione.

Personality
Prosciutto tends to belittle his fellow assassin Pesci for being unconfident about his own abilities, trying to convince him of his capabilities. This reliance is not unfounded, however, as Buccellati determines from his battle with Pesci that Pesci's abilities are actually more dangerous than Prosciutto's.

He also possesses a strong will, as shown when he suffers near-fatal wounds from being caught in the train's wheels and uses the last of his determination to keep his Stand's ability in effect for as long as possible. However, when his partner dies at Buccellati's hands, Prosciutto loses his will to live and dies after his partner.

Synopsis
Prosciutto and Pesci, are sent after Bruno Buccellati and his gang to capture Trish Una in order to find out The Boss's identity. Although they manage to catch up to the gang at the train heading to Florence, they soon loose sight of them due to a newly found turtle's stand.

In order to flush the gang out, Prosciutto decides to use his stand, The Grateful Dead, to age everyone onboard the train. This leads Guido Mista to come out from hiding to try and stop the aging. After Mista has a confrontation with Pesci, Prosciutto is able to take down Mista from behind and use his own gun to shoot him in the head, supposedly killing him. Soon after, Prosciutto and Pesci are able to find the turtle holding the gang, forcing Buccellati to come out and fight. After a short scuffle, Buccellati manages to use his Sticky Fingers to make Prosciutto fall out of the train. Out of sheer luck, Prosciutto manages to get himself caught in the train's wheels and barely survive with fatal wounds. Knowing he would die, he determined that he would use his stand and hold out long enough to give Pesci the chance to kill the gang, and steal Trish away. When Pesci died at the hands of Buccellati, Prosciutto lost his will to live and soon died along with him.

Trivia

 * He is called "aniki" ("big bro" in Japanese) by his partner-in-crime Pesci.