Huckleberry Finn
The narrator and protagonist. Huck is practical, observant, and morally instinctive. He doesn't think in abstractions — he acts on what he feels. His arc is about learning to trust his own conscience over what society has told him, and the novel tracks that growth through a series of hard choices.
Jim
Miss Watson's enslaved man and Huck's closest companion on the river. Jim is the most morally consistent character in the book — loyal, protective, and emotionally honest. Twain gives him wisdom and depth to make the injustice of his situation impossible to ignore.
Tom Sawyer
Huck's friend from St. Petersburg who reappears at the end of the novel. Tom is book-smart and adventure-obsessed, but his games have real consequences. He knows Jim is free and says nothing, which makes his elaborate rescue scheme not just silly but genuinely cruel.
Pap Finn
Huck's abusive, alcoholic father. Pap represents the worst of white poverty and entitlement — he resents Huck's education and money, and he physically endangers Huck. His death, revealed late in the novel, removes the threat that started the whole journey.
The King and the Duke
Two con men who take over the raft and use Huck and Jim as cover for their scams. They represent the predatory side of American ambition — charming, shameless, and willing to exploit anyone. Their betrayal of Jim is the act that forces Huck's defining moral choice.
Widow Douglas and Miss Watson
The women who try to civilize Huck at the novel's start. The Widow is kind but rigid; Miss Watson is stricter and owns Jim. Miss Watson eventually frees Jim in her will, but the fact that she owned him at all is what Twain wants readers to hold onto.
The Grangerfords
A wealthy Southern family who take Huck in after he and Jim are separated. They are gracious hosts who are also locked in a murderous feud. Twain uses them to satirize Southern honor culture and show that violence and respectability coexist easily.