The Italian assassin controlled by the player in Assassin's Creed II is Ezio.
Ezio Auditore da Firenze is introduced as a young Florentine nobleman whose life changes after his father and brothers are executed. He joins the Assassin Brotherhood and spends the game pursuing those responsible while uncovering a much larger Templar conspiracy.
The story follows Ezio across several decades, making him one of the series' most extensively developed protagonists. His adventures continue in Assassin's Creed: Brotherhood and Assassin's Creed: Revelations, forming a connected trilogy. Players sometimes confuse Ezio with Altaïr Ibn-La'Ahad, the protagonist of the first game, or with Edward Kenway, the pirate hero of Assassin's Creed IV: Black Flag.