Premiere time when we met Tom was in the previous book of Mark Twain called The Adventures of Tom Sawyer. Tom is Huck’s good friend. He's imaginative, mischievous, hilariously, and impractical. We believe that Huck and Tom became friends only because of being that much different. Tom has a normal home and a good upbringing, but he's different from Huck in other ways. If Tom is very imaginative, Huck is a more practical boy; if Tom always has his nose in a book, Huck runs away to the river or woods when he needs to escape.
Tom Sawyer in the Essays