* Antonio's loyalty to Bassanio. Antonio is a wealthy merchant who is friends with Bassanio. Bassanio needs money to woo Portia, a beautiful and wealthy heiress. Antonio agrees to lend Bassanio the money, even though it means risking his own fortune. Antonio's loyalty to Bassanio is ultimately tested when Shylock demands repayment of the loan.
* Portia's loyalty to her father. Portia is a wealthy heiress who is forced to marry the man who solves a riddle. She is in love with Bassanio, but she is also loyal to her father and agrees to marry the man he has chosen for her. However, Portia is resourceful and clever, and she finds a way to outwit her father and marry Bassanio.
* The friendship between Antonio, Bassanio, and Gratiano. Antonio, Bassanio, and Gratiano are three friends who are loyal to each other. They support each other through thick and thin, and they are always there for each other.