In Assassin's Creed II, which Renaissance artist helps Ezio Auditore throughout the story?

Leonardo da Vinci helps Ezio Auditore throughout Assassin's Creed II.

In the game, Leonardo is portrayed as Ezio's trusted friend, inventor, and technical adviser. He deciphers pages of Altaïr Ibn-La'Ahad's Codex and converts their designs into practical equipment, including Ezio's hidden-blade upgrades and the flying machine used during the Venice sequence.

The historical Leonardo lived from 1452 to 1519 and was active as a painter, engineer, anatomist, and inventor. Assassin's Creed II uses real features of his career while placing him inside a fictional conflict between Assassins and Templars. The game also presents his workshop as a place where historical ingenuity supports the protagonist's missions.

A common mix-up is confusing Leonardo with the game's other famous Renaissance figures. Lorenzo de' Medici is a political ally in Florence, while Niccolò Machiavelli becomes an important Assassin mentor. Leonardo, however, is the character who repeatedly turns Codex ideas into working technology.