Mantle is Archie Andrews' rival, and he loves Lodge, and the fact that Lodge loves only Archie makes Mantle jealous, so he enjoys making Archie's life impossible. Yet many of his schemes against Archie tend to backfire and allow Archie to be the victor.
Mantle is a very talented athlete who excels at American football, baseball and basketball. He also has something for another girl, Midge Klump, who is the girlfriend of another member of Archie's gang, Moose Mason. This infuriates Moose and Mantle has received some unkind, almost brutal, to say the least, treatment from Moose at times.
Though he is mainly attracted to Veronica and Midge, he occasionally seeks to date other women, including Betty Cooper.
Mantle is vain and he thinks of himself as God's greatest gift to women, but behind all that vanity lies a warm-hearted teenager.