While his younger sister, Chimeg is rash and fearless, Altan inherits a cunning nature from his father and the ability to play the long game. Like all Kuruk warriors, he is brave in battle, but he is more measured in his approach, and does not overtly challenge Chimeg, despite her many slights. 

Unlike Chimeg, Altan is not based on any historical figure. Rather, he is there as a counterpoint to his sister and to highlight conflict for the Kuruk succession.