Kurtz serves as the central figure Marlow seeks during his expedition. He embodies the extreme moral decay of imperialism, being eloquent yet megalomaniacal. Fascinating and horrifying, Kurtz is a man who inspires both awe and fear, representing the logical conclusion to the imperial activities in the Congo.

The Russian trader is a devoted follower of Kurtz, abandoning his own ambitions to be near him. He admires Kurtz's rhetoric and provides Marlow with crucial insights into Kurtz's actions and history. The Russian's identity reflects the cultural and geographical mix of Europe and Asia, adding depth to the narrative's examination of colonialism in *Heart of Darkness*.