Vincenzo "Olive Oil" Genna is a mob-boss in Chicago leading the Genna Crime Family with his five brothers.

Vincenzo holds a federal license to manufacture industrial alcohol, making him a key supplier and player in the Great Beer War, even if he prefers to stay out of the spotlight, instead sending his brothers to deal with matters that require a more personal touch.

The reason his nickname is "Olive Oil" is that he is said to have once pressed a man in a large olive press until every last drop of blood was squeezed from his body.