Dr. Bernard Rieux
The novel's narrator and central figure. Rieux is a doctor who organizes the medical response to the plague from the first deaths to the last. He is separated from his dying wife throughout the epidemic. His defining quality is persistence without illusion: he knows he cannot win, and he works anyway. He reveals himself as the narrator at the end, which reframes the entire novel as his testimony.
Tarrou
A philosophical outsider who arrived in Oran before the plague and stayed to fight it. He organizes volunteer sanitation teams with no political or religious motive, only a personal commitment to not being complicit in death. His backstory, watching his father send a man to execution, explains his worldview. He becomes Rieux's closest friend and dies of the plague near the end, just before the epidemic breaks.
Raymond Rambert
A Parisian journalist trapped in Oran by the quarantine. He spends most of the novel trying to escape to his partner in Paris. His arc is the novel's clearest moral journey: he starts as someone who believes his personal happiness exempts him from collective responsibility, and he ends by choosing to stay and help. His change of heart is not dramatic. It is quiet and almost reluctant.
Father Paneloux
A Jesuit priest who delivers two sermons that mark the novel's engagement with religion. His first sermon is confident: the plague is punishment, and the faithful should embrace it. After watching a child die in agony, he delivers a second sermon that is uncertain and pained. He can no longer explain suffering; he can only say a Christian must accept it. He dies shortly after of an ambiguous illness, and Rieux cannot classify his death as plague-related.
Cottard
A man under investigation for an unnamed crime who thrives during the plague because the quarantine suspends normal law and social order. He is cheerful and social while everyone else suffers. When the plague ends and normal life resumes, he cannot adapt. He fires into a crowd and is arrested. His arc shows the inverse of the novel's moral argument: some people need catastrophe to function.
Joseph Grand
A minor city official who spends his evenings trying to write the perfect opening sentence of a novel, rewriting it endlessly without moving forward. He volunteers for the sanitation squads despite his frailty. He nearly dies of the plague but recovers. Camus uses him to show that ordinary, unspectacular people doing small things are the real fabric of resistance.