In Assassin's Creed II, which Renaissance inventor designs equipment for Ezio Auditore?

Leonardo da Vinci designs equipment for Ezio Auditore in Assassin's Creed II.

Leonardo is portrayed as Ezio's close friend and technical ally. He studies the Codex pages left by Altaïr Ibn-La'Ahad and uses their information to create or improve tools that help Ezio, including the hidden blade and other specialized equipment.

The game places this fictional partnership within the real cultural setting of Renaissance Italy. Leonardo's documented interests in engineering, anatomy, art, and mechanics make him a natural character for the series' historical fiction, although the specific Assassin devices and secret knowledge are fictional.

Niccolò Machiavelli also appears in the game, but he is associated with the Assassin Brotherhood rather than being Ezio's principal inventor. Lorenzo de' Medici is a Florentine political leader, and Botticelli is an artist who appears in the game's Renaissance world.