AI personalities are the artificial intelligence commanders in Age of Empires III who lead the opposing civilizations to the player.
All are based on real life historical leaders of their respective civilizations throughout the period the game is set. They are not all contemporary and greatly vary in terms of lifespan ranging over 500 years from Prince Henry the Navigator (born 1394) to Chief Gall (died 1894).
Each will interact with the player as either an ally or opponent. As allies they will share strategy and tactical ideas as well as request and offer resources. Opposing personalities will frequently make provocative statements to the player commenting on their exploration, economic and military performance.