A title given to those who have conquered and mastered the game of the same name, a Duel Master is outrageously and terrifyingly strong, much more so than any other Duelist. The very first Duel Master was Yaesar, who, just before his death, used his power to divide the Duel Master's Proof into seven fragments and scattered them the world over, leaving them in the hands of children. Duel Masters are able to resonate their talents with one another. In other words, they are able to tell when another Duel Master is near.
During Duel Masters: Fighting Edge (FE), Toy, Horus, and Esmeralda were taken captive by the Fua Duelists. All of the Duel Masters gathered during the World Tournament held in Japan.
Yaesar
The Duel Master of three years prior. Yaesar lived on The Island at the same time the Fua Family had established their fort there and was Zakira's master. When he was 102, he divided the Duel Master's Proof among seven children after Shori's loss to Zakira.
Toy
A Duel Master living in the Southern Pacific Islands. At the time of his debut, he was the youngest Duel Master, but is now second to George in that regard. Toy is an incredibly powerful player, as even before he became a Duel Master, he wielded enough strength to split an island in half during his Duel of Truth with Zakira. His ace card is Death Phoenix, Avatar of Doom. He was able to excape Zakira's capture and Jed's grip, escaping with Esmeralda and Horus.
Esmeralda
A Duel Master from Spain. Three years prior, during the Fua Family's invasion, she was saved by Shori Kirifuda but lost her legs in the process, resulting in the use of artificial legs. Up until the end of FE, she used a wheelchair, but after the final duel, Dr. Root transplanted her real legs onto her body. After Richie's defeat, she traveled with Shobu to Egypt. In Egypt, they invaded Toto's fortress and she was found by a robot and escaped, only to do battle with Zakira. Although she was able to hold her own against him using Ultimate Galaxy Universe, she still lost and was captured by Zakira. Because she usually wears glasses and a hat she is seen as unattractive, but beneath it all lies a truly beautiful person. Despite not conveying her feelings, she loves Shobu.