Captain Lemuel Gulliver, the narrator.
Mrs. Mary Burton Gulliver
A species of horses who are endowed with great kindness and virtue. Gulliver lives among them for several years and afterwards is extremely reluctant to return to England.
Gulliver and the King of Brobdingnag spend dozens of hours discussing politics and comparing their two cultures.
The inhabitants of a floating island who wear mathematical and astronomical symbols and have trouble paying attention.
The Balnibarbi Lord who shows Gulliver around and teaches him about why the island is so barren.
The captain of the Portuguese ship that picks Gulliver up after his voyage to the country of the Houyhnhnms.
The Houyhnhnms' word for humans. Yahoos in the country of the Houyhnhnms are disgusting creatures.
Part III, "A Voyage to Laputa ... and Japan"
"The Author sets out on his Third Voyage, is taken by Pirates. The Malice of a Dutch-man.His arrival at an Island. He is received into Laputa."
After being at home for only ten days, Gulliver is visited by a ship captain who invites him on a voyage departing in two months. Gulliver convinces his wife that this is a good opportunity and sets off, again working as the surgeon. After they sail for three days, a storm arises, driving the ship to the north-northeast, where they are attacked by pirates. They are unable to defend themselves. Gulliver insults the captain of the pirate ship and as punishment is set adrift in "a small Canoe, with Paddles and a Sail, and four Days Provisions."
On the fifth day of sailing in his canoe, Gulliver reaches a small island, where he spends the night in restless sleep. In the morning he notices that what he thought was a cloud floating above the island is actually a floating island. Gulliver calls up to the people he sees moving about the island. They lower down a system of pulleys that can pull Gulliver up.