Karen Karstedt is one of Behrens’s outpatients. She is among the “poor sick” patients Hans and Joachim visit during Hans’s phase of visiting the sanatorium’s “poor sick” in an effort to dignify their suffering. He and Joachim visit with Karen several times. Initially well enough to leave her bed, she accompanies the cousins on several outings around town. On one occasion, they wander around a cemetery and stumble upon an unoccupied plot that will become Karen’s grave. She later dies, and Hans is disappointed at not being able to participate in her funeral.