In Assassin's Creed II, which Renaissance artist helps Ezio by creating and modifying equipment?

Leonardo da Vinci helps Ezio by creating and modifying equipment in Assassin's Creed II.

Leonardo is portrayed as an inventor, artist and trusted ally in the game's Renaissance Italy. He studies pages from the Codex of Altaïr and uses his engineering knowledge to improve Ezio's weapons and tools. His workshop also becomes an important recurring location as Ezio's journey moves between Italian cities.

The character is based on the historical Leonardo da Vinci, who lived from 1452 to 1519. Assassin's Creed II takes creative liberties with his inventions and personal involvement in the plot, so the game should not be treated as a biography. Michelangelo and Botticelli also belong to the Renaissance world, but neither serves as Ezio's principal equipment inventor in the game.