Taken together with its subordinate and sub-archetypes, the 'D/D' archetype features a mild 'business' sub-theme (probably to fit the profession of their owner in the anime), with many support cards referencing elements of modern big business. In contrast, the ' D/D/D' sub-archetype features a distinct design style from the rest of the archetype, with many of its members modeled after famous conquerors from world history. The regular 'D/D' monsters seem to be based on different figures and monsters from Western mythology, while the 'D/D Savant' monsters are references to great natural scientists from Western history.
