Former leader of the Acacia Dragoons and cursed by the power of the Masamune, Dario's as brilliant a fighter as they come. His powers lie in remission, as he does nothing but wait and wait, for the person to come who can break his deadly, silent, curse.

Dash and Gash is a brutally effective tactic in any duel Dario faces. He's put it to good use, even when faced with painful defeat. Unfortunately, he won't get any more chances of using it in the League.

After receiving what they believed to be unfair losses against Dario, the Dragon Warrior 4 crew, along with Cecil and Luc, hired investigators and lawyers on the background of the Dragoon. The facts they uncovered were startling. Illegal pre-battle steriod usage and rampant judge bribing in Season 2! Records showing Dario to be an unrankable secret super boss that can be fought at any time! Breaking of the Variable Speed Law reminiscent of the infamous Dueling League vs Necron case! After a maelstorm of controversy, the decision was reached. While Dario may still keep his title as the Season 2 Heavy champion, he is to pay the people he defeated for a considerable sum for emotional damages, and resign from the Duelling League. No one knows where Dario is now, but some say he lurks in the halls of NR, hoping to reclaim the glory he had lost.