Who is Giuseppe Petacchi from Thunderball and what is their importance?

Giuseppe Petacchi is the self-serving Italian pilot hired by SPECTRE to steal the plane containing two nuclear weapons. SPECTRE kills the pilot instead of paying him off after he successfully crash lands the plane in the Bahamas. Petacchi turns out to be the brother of Domino, Largo's mistress, and she avenges his death by siding with Bond to defeat Largo and SPECTRE.