A wise and intuitive twelve-year-old girl traveling with her father, distinguished by her strong connection to nature and accompanied by her pet monkey, who plays a key role in guiding Alex through the Amazon.

A famous and adventurous journalist in her sixties, who takes her grandson Alex on a journey to the Amazon, displaying a tough-love approach that aids in his personal development.

A diminutive and self-important anthropologist on the expedition, who is initially cowardly and dismissive but finds new insights as the story progresses.

A Venezuelan doctor on the expedition aiming to vaccinate the Amazon natives, who is known for her beauty and professionalism while facing challenges in being taken seriously.

A skilled Brazilian guide and pilot for the expedition, who has a profound understanding of the Amazon and serves as a link between the world of the natives and the outsiders.

An ancient shaman with spiritual insight, who aids Alex and Nadia in their journey through the Amazon and helps them unlock their potential.

A wealthy and charismatic entrepreneur with significant influence in Santa Maria de la Lluvia, who plays a critical role in the expedition and its implications for the Amazon.

A commanding military officer responsible for the area's tribes, who becomes a threatening presence due to his concealed motives.

The elderly chief of the People of the Mist, who plays a central role upon Alex and Nadia's arrival in the tribe and has significant cultural importance.

An elderly tribe member who becomes the first female chief and demonstrates leadership during critical moments in the story.

An enigmatic figure on the expedition who serves as Leblanc's assistant, with deeper motivations than initially apparent.

An English photographer documenting the Amazon expedition, known for his quiet demeanor and significant contributions in capturing key moments.

An eccentric priest with deep respect for native culture, who provides guidance and support to the characters during their Amazon adventure.