Carlo Grimaldi
Carlo Grimaldi was a Templar and a government official. He was close to Doge Monicego of Venice and plotted to kill him. He was also a member of the Council Of Ten.
Carlo craved for political power, and knew the Doge of Venice. He used this to his advantage, and had heard that the Doge's daughter wanted to be with a slave but her father would not allow it. Carlo told them to escape on a boat that very night. When they arrived at the boat, they found Carlo waiting for them with a few guards and the Doge himself. The slave was killed and the Doge trusted Carlo enough to allow him into the Council Of Ten.
Carlo is first seen meeting with Emilio Barbarigo and informing him of Ezio's arrival in Venice. He leaves just before Emilio is assassinated. He is next seen in Venice meeting with Marco Barbarigo, Dante Moro and Silvio Barbarigo. They plot to poison the Doge so one of them can replace him.
Carlo is encountered in the Doge's palace, prior to Ezio's arrival via Leonardo's Flying Machine, where he is playing chess with the Doge after hearing a commotion outside the Palace. Ezio rushes in only to realize that it was too late, the Doge has been poisoned. Carlo blames Ezio and alerts the guards for his death as he runs out of the room. Ezio pursues him and assassinates him in the courtyard, claiming it takes one Assassin's to kill another, as Carlo last words are"We kill thinking it's best for us, do we not Messer Ezio". Ezio claims" I do this not for myself, I make this sacrifice for the greater good."