Drago Brachio functions as the dark counterpart to Dino Brachio within the Dragozaur forces. Diamond Ryugu, leader of the Dragozaurs, created this entity using a Dark Crystal. He belongs to a group designated as the Drago Clones or Shadow Warriors, evil replicas crafted to oppose the heroic Dino Knights.

Physically, Drago Brachio mirrors Dino Brachio's brachiosaurus form but displays a darker, metallic color scheme typical of Dragozaurs. His primary armament is the Brachio Axe of Venom, contrasting directly with Dino Brachio's Axe of Valor.

Under Diamond Ryugu's command, Drago Brachio operates within the Dragozaur army, which aims to drain Earth's life force. His role remains adversarial, directly countering the Dino Knights' planetary defense efforts.

Drago Brachio's narrative concludes in episode 11. During a confrontation, Dino Brachio destroys him utilizing the Kenty Skeletal Drill—a weaponized iteration of the Dino Weapon Dino Kenty. No further appearances or developments occur in documented media.