In Assassin's Creed II, which Renaissance artist helps Ezio by building inventions?

Leonardo da Vinci helps Ezio in Assassin's Creed II by building and adapting inventions.

Leonardo is portrayed as Ezio's close friend and technical ally in the Renaissance setting. He deciphers pages from Altaïr's Codex and creates equipment based on the designs, including improvements to Ezio's hidden blades and a flying machine used during a mission in Venice.

The game uses a fictionalized relationship between Ezio and Leonardo while placing them among real Renaissance locations, patrons, and political events. Leonardo's workshop and inventions help connect exploration, story progression, and historical atmosphere.

Michelangelo, Raphael, and Donatello were also major Italian Renaissance artists, but they are not the inventor ally who assists Ezio in Assassin's Creed II. The name “Leonardo” is therefore the specific answer rather than a general reference to Renaissance art.