What was the name of C.S. Lewis's fictional hero in the Space Trilogy?

Elwin Ransom is the fictional hero of C.S. Lewis's Space Trilogy. Ransom is a philologist and university professor who becomes involved in interplanetary conflict and questions about humanity's moral place in the universe.

The trilogy consists of Out of the Silent Planet, Perelandra, and That Hideous Strength. Ransom travels to Mars, called Malacandra, in the first novel and to Venus, called Perelandra, in the second. The final book moves much of its action to Earth and connects scientific ambition with spiritual and political dangers.

The character is sometimes described as an autobiographical portrait of Lewis, but Ransom is a fictional creation rather than a direct memoir figure. Lewis drew on his interests in language, medieval thought, mythology, and Christian theology when building the trilogy's imagined worlds.