Which historical artist appears as an important ally in Assassin's Creed II?

Leonardo da Vinci appears as an important ally in Assassin's Creed II.

Set largely in Renaissance Italy, Assassin's Creed II portrays Leonardo as a friend and supporter of Ezio Auditore. He translates pages from Altaïr's Codex, maintains equipment, and helps Ezio understand and use several devices. The relationship connects the game's fictional Assassin storyline with one of the period's best-known historical figures.

Leonardo's workshop and inventions support Ezio's missions, including a flying machine used in Venice. The game takes creative liberties with Leonardo's life and places him in situations created for the fictional plot, so his role should not be treated as a literal biography.

The other names are also Renaissance artists, but they are not the principal artist ally in Assassin's Creed II. Michelangelo, Raphael, and Donatello belong to the same broad cultural period, which makes them plausible but incorrect alternatives.