2001: A Space OdysseyArthur C. ClarkeSpace Odyssey, book 1

Characters in 2001: A Space Odyssey

4 characters, main characters first.

Main characters

David Bowman
Commander of Discovery One and its sole surviving crew member, who journeys alone toward the source of the monolith's signal.
Also in 2061

Antagonists

Hal 9000
The Discovery's sentient onboard computer, whose concealed mission orders drive it into fatal malfunction.
Also in A Rope-In Case, 2061

Supporting characters

Dr. Heywood Floyd
The scientist who investigates the monolith excavated on the Moon.
Also in A Rope-In Case, 2061