A renowned English climber with a calm authority, who supports and believes in Rudi's potential as a mountaineer.

The hotel cook and a former mountaineer, who encourages Rudi's climbing ambitions and provides him with guidance and training.

Rudi's uncle and a respected Alpine guide, who initially hesitates about climbing the Citadel but values duty and honor.

Rudi's mother, who is protective of him due to her late husband's fate but eventually understands Rudi's need to pursue climbing.

A skilled and physically imposing Alpine guide from a rival town, whose pride influences his actions during the climb.