He is portrayed by Bruno Amato.
He is an adult who has brown eyes. He is bald with a small mustache and beard. He is a prisoner, and is very self-conscious about his baldness.
Harold was in jail along with Captain Man, who got arrested for not wearing a hair net.Later he saw how Henry, Charlotte and Jasper were also arrested for breaking rules and Harold did not want to be seen and Captain Man asked Jasper to meet Harold and Jasper spoke with Harold.Kris and Jake were also taken to the prison and Jake was in another cell and Jake from his cell with other prisoners were playing the Christmas song with their spoons and Henry, Captain Man, Kris, Charlotte, Jasper and Harold were singing the Christmas song together.