Petro first appeared on the 11th chapter on manga, when he arrives with his troops to come and investigate the attack against Catherine Sforza. Denying from turning back. Later he is seen attacking against the hotel, where Ion and Radu are with Abel and Esther. Being there to capture the vampires, who were hiding in there. Abel confronts Petro to buy enough time for Ion and Esther to escape from the Hotel. During the battle Petro hurts his own men while thinking that Abel did that, which just made the big armor man more angrier. In the fight Petro used a serum the people of Karthago.