Sauron DefeatedJ.R.R. TolkienThe History of Middle-earth, book 9

Characters in Sauron Defeated

3 characters, main characters first.

Main characters

Frodo Baggins
The final chapters of his story -- the destruction of the Ring and the Grey Havens farewell -- are documented here in their evolving draft forms.
Also in The War of the Ring

Antagonists

Saruman
The alternative fates Tolkien considered for Saruman are among the most surprising revelations in the manuscript history.
Also in The Treason of Isengard

Supporting characters

Samwise Gamgee
His role in the final chapters, including the scouring of the Shire and the conclusion of the story, is traced through manuscript evidence.