Cortés is a Spanish explorer and conqusitador based off the real life Spanish Conquistador Hernán Cortés. Hernán Cortés exploration and conquer eventually led to the fall of the Aztec Empire.
Hernán Cortés is a cold man who has no problem with punishing people, especially Miguel and Tulio after they accidentally stowed away on his ship, as evidenced when he promises they will be flogged and then be sold as slaves. He is a no-nonsense man as well, one who doesn't suffer fools lightly. This is shown when he has Tzekel-Kan seized for presumably leading him and his men to a dead end (when in reality, it was the newly blocked entrance to El Dorado).