Jacques "Jack" Duquesne is a wealthy socialite and talented swordsman who became engaged to Eleanor Bishop. After Armand Duquesne III's death, Jack was quickly suspected of committing his murder by Eleanor's daughter Kate Bishop, who he had failed to impress as a stepfather. Eventually, Eleanor framed Duquesne for Armand's death by also pinning his name to a shell corporation that laundered money for the Tracksuit Mafia. Although quickly released and proven innocent, Duquesne later learned Eleanor had deceived him, and joined Kate, Hawkeye, and their allies in fighting off the Tracksuits during the Battle at Rockefeller Center. After Eleanor's arrest, Wendy Conrad offered Duquesne membership in a roleplaying guild with the NYC LARPers.