Incas
- Apo – An Inca wise man imprisoned along with many of his people by Governor Pizarro.
- Ketcha – A warrior of the High Peak.
- Illama – One of the children of the High Peak.
- Kraka – Chief of the city of the High Peak.
- Kiyun – An Inca prisoner in Pizarro's Fort.
- Luca and Shicomi – Two children of the High Peak who befriend Esteban, Zia and Tao.
- Myuca – An old story teller who knows many Inca legends.
- Pasha – Once a High Priest of the Cities of Gold, Pasha is imprisoned in his own temple by Pizarro.
- Telapa – A citizen of the High Peak.
- Tohawka – A young Inca who tries to escape from Pizarro.
- Upanki – Leader of the warriors of the Fort of the Black Eagle.
- Wayna – A warrior of the High Peak who is sent to guide and protect the children.
- Yacuma – A woman who looks after the children while they stay at the High Peak.
Read more about this topic: List Of The Mysterious Cities Of Gold Characters, Secondary Characters