The leader of the Ares 3 mission who makes difficult decisions in the face of danger and later grapples with her sense of guilt over leaving Mars without Watney.

NASA's director of Mars operations, heavily involved in coordinating efforts to support and rescue Watney from Earth.

The pilot of the Ares 3 mission, known for his humorous personality, who is part of the crew's efforts to return to Mars.

A software engineer on the Ares 3 mission, whose coding abilities play a crucial role in the mission's outcome.

The in-flight surgeon and EVA specialist on the Ares 3 mission, instrumental in the physical rescue of Watney.

A chemist on the Ares 3 mission, who uses his expertise to assist in the plan to rescue Watney.

The head of NASA, responsible for balancing the agency's interests with the mission's needs during the rescue efforts.

The head of the Ares 3 mission, who advocates for the crew's well-being in NASA's decision-making processes.

The NASA public relations director who manages the media attention surrounding the mission and Watney's situation.

A satellite engineer at NASA who first notices signs of Watney's survival and monitors his progress on Mars.

A physicist at NASA who devises a critical maneuver for the Hermes to assist in Watney's rescue.

The director of JPL, focused on developing and adapting technology to aid in Watney's rescue operation.