Shylock
The Jewish moneylender who agrees to lend Antonio money in exchange for the pound-of-flesh bond. He starts as a bitter but rational businessman and becomes increasingly rigid after Jessica's betrayal. The court scene destroys him financially, religiously, and personally. He's the play's most complicated figure.
Portia
The heiress of Belmont who is bound by her father's will until Bassanio chooses correctly. Once free, she takes charge completely. She disguises herself as a lawyer, wins the trial, and orchestrates the ring subplot. She's witty, resourceful, and occasionally cruel.
Antonio
The merchant whose ships are at sea when he needs cash. He signs Shylock's bond out of loyalty to Bassanio. He's passive for most of the play, waiting to die, and is rescued entirely by Portia. His deep affection for Bassanio drives his willingness to risk everything.
Bassanio
Antonio's friend and Portia's eventual husband. He's charming but financially irresponsible. He makes the right choice in the casket test, but Portia and Antonio do the hard work of the plot. He's more of a catalyst than a hero.
Jessica
Shylock's daughter who converts to Christianity, elopes with Lorenzo, and takes her father's money. The play treats her escape as romantic and good. But her betrayal of Shylock is also what pushes him toward his most vengeful position in court.
Gratiano
Bassanio's companion who wins Nerissa. He's loud, impulsive, and often says what other characters are thinking but won't say aloud. He delivers the harshest lines against Shylock in the courtroom.
Nerissa
Portia's maid and confidante. She marries Gratiano and assists Portia in the courtroom disguise. She's sharp and loyal, and she runs the ring subplot alongside Portia.
Lorenzo
The Christian man who elopes with Jessica. He benefits enormously from the arrangement Shylock is forced to accept at the end, inheriting Shylock's estate. He's treated sympathetically by the play, though he helps himself to another man's daughter and fortune.