The Unnamed Narrator is an educated individual living in the 19th century who suffers from a paralyzing fear of being buried alive. He struggles with catalepsy, a physical condition that causes death-like trances, which further intensifies his morbid obsession. His severe paranoia drives him to remodel his family vault with survival features and withdraw completely from society, transforming his daily life into an agonizing state of anticipation and dread.

The Friends are the closest companions of the narrator. They are trusted individuals whom the isolated protagonist relies upon heavily to ensure his physical safety. They swear sacred oaths not to bury him until his body decomposes beyond preservation.

The Unseen Figure is a mysterious entity that haunts the narrator's subconscious mind. It speaks directly to him, physically grasps his wrist, and forces him to view the graves of humankind. This presence represents the narrator's deep-seated anxiety about death and the unknown boundary between life and death.

The Acquaintances are the general members of the narrator's social circle and surrounding community. As his paranoia deepens, he becomes increasingly suspicious of them, irrationally believing they might conspire to bury him alive simply to get rid of him.

The Artillery Officer is a historical figure whose unfortunate fate becomes a primary subject of the narrator's morbid fixation. The officer's experience of being buried alive and creating a commotion beneath the earth serves as concrete evidence that fuels the narrator's extreme paranoia.

The Shrouded Woman is an unfortunate victim of premature burial who becomes entangled in iron as she meets her end. She haunts the narrator's sleep as a potent symbol of death and the human inability to escape mortality.

The Conqueror Worm is a symbolic entity that populates the narrator's dark visions of the afterlife. It slumbers alongside shrouded bodies in his dreams, reinforcing the grim idea that death always conquers life in the end.