Don Piero, known as Garome in the Japanese and German versions, is a vicious money trader. In the English version however, he is said to be a mob boss.
Piero is a slick loan shark who rips off the people he deals with by making them sign some false documents, then taking their belongings. After Carly Carmine and Jack Atlas learn about Piero's shady dealings, Jack challenges Piero to a Duel to win back the illicit contracts and lift the debts, wagering "Red Dragon Archfiend" and the Phoenix Whirlwind.
Although Piero's cards flooded Jack's field with "Loan Tokens", Jack was able to win and defeated Piero (nearly knocking off the hair piece on his head). After Piero's defeat, his men fled the scene with Piero, dropping the contracts and leaving them to be ripped apart by Jack, freeing everyone who was in Piero's debt.