Leamas’s romantic interest, she offers a human connection lacking in his life. A member of the British Communist Party, Liz is characterized by her fundamental honesty and a warm personality tempered by shyness.

A fearsome spymaster, Mundt is an antagonist and former Nazi who has risen through the ranks of the Stasi. His reputation instills fear in both his own agents and the British, and he maneuvers through the Cold War with an aura of mystery.

Initially introduced as a secondary antagonist, Fiedler is a deputy under Mundt. Passionate about Communist ideology, he emerges as a complex figure whose loyalties and understanding of the political landscape add depth to the narrative.