Jesse Katsopolis is the brother-in-law of Danny, the younger brother of Pam and the uncle of her daughters D.J., Stephanie and Michelle. One day, Jesse marries Rebecca "Becky" Donaldson. He becomes a father of twins, Nicky and Alex. His real name is Hermes Katsopolis, but as a child, he was mocked. So he asked his parents to change his first name in Jesse. When he became an adult, he learnt to appreciate his real name. Nevertheless, he wants to be called Jesse. He is possessed by his hair. He often talks about it and treat it. In the beginning he had long hair. When Stephanie cut his long hair by mistake, Jesse was complete upset. In contrast to Danny, Jesse often tends to careless decisions and inappropriate behaviour, especially if it's about to be well off with his nieces. He allows the girls many things, which the father wouldn't approve it. In time Jesse shows his adult side. When he gets excitement, he often uses the saying: "Have Mercy". Apart from adoring his hair, Jesse is a big fan of Elvis Presley. He's also a musician and singer of the band "Jesse and the Rippers". Although they have a lot of minor gigs, their success is not remarkable. That's why he has to work for the company of his father as a pest controller on the side. In addition to that, Jesse strives for a career  in the advertising and composes jingles with Joey, which he sells to different companies. In the sixth season it becomes well-known that Jesse has no high school diploma. He keeps it secret from his family. When the truth brings to light, he catches up on his final exam. Later, he presents the popular radio show "Rush Hour Renegades" with Joey. He becomes an owner of a nightclub called "The Smash Club" in the seventh season and after that he creates a new band "Hot Daddy" and "The Monkey Puppets".