Twelve year old Esteban was brought up as an orphan in Barcelona by Father Rodriguez, dean of the cathedral. When his gurardian dies, he meets Mendoza, the man who claims to have saved him when he was a baby. Mendoza claims that his father might be still alive somewhere in the New World. Esteban leaves with Mendoza to try to find his father there. Esteban is brave and fiercely loyal to his friends, but he is also impulsive and is hampered by his fear of heightsHe is known as the Child of the Sun for uncanny ability to make the sun come out. He wears a mysterious medallion, which Mendoza believes holds the key to the cities of gold. But Esteban is only interested in find his father, and has no lust for gold.
A young Inca girl who was kidnapped by the Spanish and taken to the royal court as a gift to the Princess Marguerita. She is 11 years old when she meets Esteban aboard the Esperranza, and they soon find out they wear similar medallions and are both looking for their fathers.Quiet and shy, Zia nevertheless develops a close relationship with Esteban and is much more suspicious of Mendoza's motives than her friend. And by refusing Pizarro's order to read the golden quipu, which reveals the secrets of the cities of gold, she demonstrates immense bravery.
Tao is a 13 year old, who is the last surviving descendent of technologically-advanced Hiva (Mu) empire, which sank beneath the waves thousands of years ago.When Esteban and Zia find him, he is living alone on an island, in a large treehouse, with only his pet parrot for company. He is very intelligent and is so proud of his heritage that he can often appear haughty.Although he is clumsy, he comes up with ingenious inventions which get his friends out of a number of tight spots. He carries an encyclopedia containing all the knowledge of the Hiva people and a mysterious golden jar, whose importance only becomes apparent much later.
Mendoza is a Spanish navigator who was a part of Magellan's expedition. He is able to read the stars and especially skilled at negotiating the fierce Straits of Magellan. He jumped into that sea to save the baby Esteban after he and his father were caught up in a storm. He has the sun part of Esteban's medallion and keeps it to ensure he stays close.When he sets off on his adventure, wealth is all that interests him, and he see the children merely as a means to an end to find the cities of gold. However, he eventually becomes fond of them and starts putting their interests ahead of his own.
Sancho and Pedro
An Aztec who is looking for gold. She travels with The Doctor and Tetiola, in search of gold.
The Doctor (Fernando LaGuerra)