Marco Bonnaro is a Soldier and one of James Pegorino's bodyguards during the meet with the Pavano Family in the mission Pegorino's Pride. He is killed by Pavano hitmen, as well as his friend Peter Marchetti. He was generally a friendly character.
Mission appearances GTA IV Edit
Pegorino's Pride (Killed)
His Surname could be a reference to the Real Life Bonanno Crime Family.