Charlie Brown's relationships with other "Peanuts" characters initially differed significantly from their later states, and their concepts were grown up through this decade until they reached their more-established forms. An example is his relationship with Violet Gray, to whom he was introduced on the February 7, 1951, strip. The two constantly remained on fairly good terms; a bit different from their now-known relationship. In the August 16, 1951, strip, she called Charlie Brown a "blockhead", being the first time Charlie Brown was referred by that insult. The strip for November 14 of that year featured the first appearance of the famous football gag, with Violet in the role that would later be filled by Lucy.