Biff Hooper
Allen 'Biff' Hooper is a six-foot, blond haired, muscular friend of the Hardy boys. He excels at boxing, wrestling and football. His nickname comes from a distant relative who was a boxer named Biff. He owns a bloodhound named Sherlock and a Great Dane named Tivioli, and a motorboat named Envoy. He can play the harmonica. In one of the casefiles he is part of "The circle of twelve" which is a group of vandalism. He is in the group because of his girlfriend. Because of the circle of Twelve he nearly gets himself killed.
Read more about this topic: List Of The Hardy Boys Characters