Alvin Seville and Brittany Miller are the love/hate relationship couple that often runs as a gag throughout the cartoon series. Brittany and Alvin are constantly picking on each other, yelling at each other, betting with each other, and trying to prove the other wrong, sometimes leading to great misunderstandings or adventures. Whether or not these confessions are puppy love, a crush, or real feelings is unknown, but under all the tension, they are shown to truly care for one another. They are shown as being married in the future in one episode of the cartoon series. Alvin and Brittany were rivals.