Two classes of characters populate this story: those who are alive in the present time and those who belong to Incan history and mythology. Among the historical figures are the Spanish explorers and the last emperor of the Incas, Atahaulpa. The Incas considered Atahaulpa a descendant of Inti, their first ruler, who in turn was a direct descendant of the Sun God. Titu, Cusi's natural father and a descendant of Atahaulpa, abdicated and left his infant son in his place.

Cusi and Chuto are the main presentday characters. Misti, a pet llama, could be considered a minor character since she seems responsible for some of Cusi's important actions. Other characters, such as Cusi's natural parents, make only cameo appearances.

Chuto was also Titu's mentor at one time, and the old man believes that his strictness as a teacher contributed to Titu's rejection of Hidden...