Dark Dragon begins as a Dragozaur, an alien species that devours planetary life force. He betrayed his own kind before the main events, establishing him as an ancient enemy of the Dino Knights, though the specifics of this betrayal are unexplained.

He commonly manifests as a humanoid figure. In combat, he shifts into a European dragon-like form featuring a distinctive blade on his right wrist. This battle form summons and commands bats, deploying them as additional forces or scouts. His color scheme is predominantly silver and black, distinguishing him from other Dragozaurs.

Within the Dragozaur hierarchy, Dark Dragon functions as a sorcerer. He prioritizes cunning strategy and manipulation over direct conflict, employing psychological warfare, deception, and exploitation of environmental or opponent weaknesses, demonstrating high intelligence. His magical abilities are diverse and adaptable, often revealing new powers to meet specific situations, though these abilities are seldom reused consistently.

A significant act was his creation of the Drago Clones: near-perfect metallic duplicates of the core Dino Knights. These clones were forged using the energy of a Dark Crystal under Diamond Ryugu's direction. The crystal's exact nature and origin remain undefined, though it also enabled the Dragozaurs' transformations.

Initially aligned with Diamond Ryugu's goal to harvest Earth's life force, Dark Dragon later pursued his own schemes. A key manipulation involved orchestrating the resurrection of Gigano Dragon after Gigano Dragon's initial defeat. This process required linking Gigano Dragon's remains with Drago Wing's energy.

His story concludes in the series finale. He is destroyed by Dino Tyranno after Diamond Ryugu's primary plan fails and the Dino Knights launch their final offensive. His background, abilities, and role receive no expansion in other media beyond this point.