Inez is a 19-year-old heiress living in Buenos Aires who longs to join her parents on their annual archaeological expeditions to Egypt. When she receives word that they have perished in the desert, her persistence drives her to run away to Cairo to uncover the truth. She possesses a mysterious, magic-touched gold ring from her father that allows her to sense artifacts connected to Cleopatra.

Whitford is a young British man employed by Ricardo in Egypt. He initially appears cynical, frequently using a silver flask and flirtation to maintain emotional distance. A former soldier who was dishonorably discharged from the British military, he possesses a protective streak and surprising aristocratic mannerisms that hint at a privileged background in England.

Ricardo is an imposing, brawny archaeologist who leads top-secret excavations in Egypt. He is fiercely dedicated to preserving Egyptian artifacts in memory of his late wife, Zazi, and works closely with her brother Abdullah. As Inez's legal guardian, he is determined to send her back to Argentina for her own safety.

Lourdes is Inez's mother, a woman with hazel eyes and freckles who spends several months in Egypt every year. To polite Argentine society, she presents as a proper, conventional lady, but she harbors a mischievous, adventurous side during her archaeological trips. Her sudden disappearance in the desert prompts Inez's journey across the world.

Elvira is Inez's younger, adoring cousin who lives with her in Buenos Aires. She shares Inez's warm demeanor and closely resembles her, though Elvira has noticeably greener eyes. Naive and lighthearted, she frequently tags along after Inez and views the world with credulous wonder.

Cayo is Inez's father, known for his wild, curly hair and strong morals regarding antiquities. He financed and participated in archaeological digs with his brother-in-law in Egypt until his reported disappearance in the desert.

Abdullah is the brilliant Egyptian archaeological mastermind behind Ricardo's excavations. He possesses vast knowledge of ancient Egypt but is barred by colonial authorities from leading official operations. He works diligently in secret to protect his country's history from foreign smugglers.

Basil Sterling is an affluent Englishman and officer in the British Antiquities Service. He embodies imperial entitlement, unapologetically using his status to confiscate Egyptian artifacts for himself, including stealing Inez's magical golden ring.

Tía Lorena is Inez's strict aunt who oversees her upbringing in Argentina. She expects her niece to be docile and obedient, focusing on managing an estate and meeting respectable suitors rather than dreaming of foreign archaeological digs.

Mr. Fincastle is a brawny British man hired by Ricardo to provide security for the excavation team aboard the Elephantine. He is highly suspicious of his surroundings and fiercely protective of his daughter's safety during their river travels.

Isadora is Mr. Fincastle's daughter who travels with him on the expedition up the Nile. Though expected to act prim and proper, she secretly craves adventure and bonds with Inez over their shared frustrations with strict societal expectations.

Monsieur Maspero is the French head of the Antiquities Service and curator of the Egyptian Museum. He holds significant authority over which archaeologists receive digging licenses in occupied Egypt, making him a crucial figure for any excavation team.

Sir Evelyn is the British consul general of Egypt. He represents the colonial power structure that restricts Egyptian self-governance and professional opportunities, maintaining strict European control over the region.

Thomas Burton is a wealthy, seemingly bashful American businessman staying at the opulent Shepheard's Hotel in Cairo. He initially appears as a courteous, innocuous guest who helps newcomers find their way around the massive hotel.

Zazi was an Egyptian woman, Ricardo's beloved late wife, and Abdullah's sister. Her memory inspires Ricardo's ongoing commitment to respectfully preserving Egyptian history rather than allowing artifacts to leave the country.

Kareem is a young Egyptian boy who works as part of Ricardo's crew aboard the Elephantine. He is resourceful and willing to help those who cross his path at the bustling docks.

Amaranta is one of Inez's cousins in Argentina, living under the strict guidance of Tía Lorena. She remains in Buenos Aires while Inez travels abroad.

Sallam is an observant attendant at Shepheard's Hotel in Cairo. He notes Inez's strong resemblance to her mother and offers assistance during her stay in her parents' suite.

Farida is Abdullah's granddaughter who works alongside the archaeological team. She uses her skills as a photographer to carefully document their secret findings before artifacts can be moved or stolen.

Ernesto is a respectable young man in Argentine society chosen by Inez's parents as her prospective husband.

Peter is an Englishman working for the Antiquities Service in Cairo who maintains shadowy connections.

Porter is Whitford's older brother who remains in England. He represents the aristocratic family duties and expectations that Whitford left behind when he moved to Egypt.

Arabella is Whitford's sister. She is an artist, a detail Whitford shares affectionately when admiring Inez's own sketching skills.

Blanche is a woman working at a brothel in Aswan who receives patronage from Mr. Sterling, making her a valuable source of information about his movements.