Eckels represents flaws common to human nature, including a pride that denies an honest understanding of self and neglects to consider consequences. As the story’s protagonist, Eckels undergoes significant change once he is forced to admit his own fears. He begins as a nervous, excited hunter who maintains a brave face. He nervously pays for the trip and is angered when he suspects the clerk of trying to frighten him. Amazed by the time machine, he puts thoughts of fear behind him. Still, hints that he is secretly afraid will surface, as when he wonders if the guns are powerful enough to kill their prey.

Eckels continues denying his fear upon arrival in the past, hiding behind an overwhelming sense of self-importance. He questions the rules around which animals might be shot, claims that he does not understand the rationale Travis provides, and even says, “So what?” when Travis explains the significance of a single mouse. However, when he is told that they do not know whether they will get out alive, he betrays some fear. He becomes careless as he denies his fear, aiming his rifle haphazardly and admitting that he is “shaking like a kid” as they near their target.

When they finally arrive, Eckels, overwhelmed by fear and regret, admits to a grave miscalculation about the mortal danger they face. He urgently seeks an escape, expressing panic and an inability to control himself, ultimately fleeing despite guidance provided by Lesperance.

Upon his return, Eckels grapples with overwhelming guilt upon witnessing the catastrophic outcomes of his decisions, signaling a profound shift in his character. He comes to the stark realization that there is no way to undo the harm he has caused, and he must confront the repercussions of succumbing to his fear. Ironically, the ultimate consequence of his fear of death materializes in his own demise, as Travis shoots him.