Kongo

A crippled, vengeful mastermind who rules a Congo jungle compound. He maintains control over locals by dispensing sugar and liquor and by staging magic tricks to feign supernatural power. For 18 years he has plotted revenge on Gregg, intending to force his old rival into a final, devastating defeat.

The daughter whose origin is tied to Flint and Gregg; raised in a convent by nuns in Cape Town and later inflamed by captivity. She becomes dependent on brandy after months in Zanzibar, and is used by Flint in his revenge scheme while forming a fragile bond with Kingsland.

The man once responsible for Flint's injury and the husband of his former wife. He returns to confront Flint, only to be trapped by the old rival’s schemes. His past is revisited as he recognizes Flint and is ultimately killed during the confrontation.

A cynical, drug-addicted doctor who becomes entangled with Ann. He provides a lifeline for the physical relief Flint craves and later becomes the object of Ann's affection, helping her envision a future away from the camp.

Flint's fiancée who assists in his schemes and performs the deceptive tricks that sustain his control. She remains fiercely loyal to Flint, navigating a dangerous plot that hinges on fear and power.

Flint's henchman who operates on the ground, executing the plan to bring Ann to Flint and enforcing the rigid rules of the compound. His presence underscores the brutality underpinning Flint's revenge.

Another loyal accomplice helping carry out Flint's manipulative agenda and maintain the myth of power around the camp. He plays a supporting role in the chain of control and threat.

The loyal native tasked with patrolling the jungle perimeter. He is both a tool of Flint’s control and the instrument of Gregg’s downfall, ultimately killing Gregg as part of the plan.

An uncredited camp figure who appears among the many workers and guards defending Flint's perimeter; his role emphasizes the harsh environment and the scale of Flint's operation.

The nun who helped raise Ann's infant to keep her body and mind 'clean' within the convent. Her presence highlights the intersecting world of religion and captivity in the story.

A Native Messenger who conveys orders and information within the Congo setting, reflecting the communication network that supports Flint's control.