Dumon, known as Durbe in the Japanese version, is an Emperor of the Barian World in the Yu-Gi-Oh! ZEXAL anime. After the disappearance of Nash and Marin, Dumon assumed leadership of the five remaining Barian Emperors in an attempt to protect the Barian World from Astral.[4] He was later absorbed by Vector when attempting to protect Marin. He and the other Barian Emperors were revived and revert back into his true human self by the power of the Numeron Code following Yuma's and Astral's final Duel. Dumon is the only Barian Emperor that never Dueled in his human form, or against Yuma Tsukumo. Dumon appears most often under his gray cloak and has gray eyes that glows red. In his Barian form, his skin is of a wisteria color, he has spiky gray hair, two blue markings on the sides of his face, and silver armor plating with blue gems covering different parts of his body and a Barian Emblem found on the right side of his chest. Unlike most Barians, he has a visible nose in his true form and his eyes are completely gray with no visible pupils. When on Earth, his appearance is that of a bespectacled boy. His hair is darker and he wears a black vest over a white shirt, gray pants, a gold bracelet with a Baria Crystal on his right wrist, light gray and dark brown boots, and an olive green scarf tied around his neck. He would also come to use his missing comrade's name, Nash, as his alias when he first arrived in human form.[2] Following his revival after Yuma Tsukumo and Astral's ceremonial Duel, Dumon attends Heartland Academy as a third-year student, thus wearing the standard blue-lined uniform, blue pants and brown shoes. In in his previous life, Dumon was a legendary knight and accordingly wore silver armor with a white cape. Unlike the human form that he took on in present-day Earth, he did not wear spectacles. Among his allies, Dumon is shown to be the most level-headed among them and was at one time their leader. He is shown to care about his fellow Barians greatly, often voicing his high opinion of them and usually letting them know that he has faith in them before seeing them off on their mission.[5][6] Dumon is very loyal to Barian World and prioritizes its safety above all else. Likewise, he is extremely loyal to the original leader of Barian World, Nash, going to great lengths to find and restore him to his original position within the Seven Barian Emperors. This appears to have stemmed from their previous human lives. Dumon is also shown to intimidate the other Barians, especially Alito, who often complained about the mission he received, but complied when Dumon used a strict tone.[6] He also seems to dislike confrontation as he often puts an end to arguments and fights between his comrades,[5][7][2] though this did not stop him from threatening to put an end to Vector with his own hands if the latter did not stop acting alone.[7] He is not averse to praising his enemies, as he did during his Duel with Shark, where he complimented the young man's determination and Dueling skills.[8] He was also willing to sacrifice his life in order to protect his comrades, as seen when he was trying to used his "Celestial Rage" to end his last Duel against Vector in a draw, as well as using "Sacred Shield" to protect Marin, even though it meant his death. Dumon, like the other Barians, has been shown to teleport using portals. Dumon has also been shown to generate a large energy ball which he can use to fly. Dumon is one of the few Barians who can stay in his true form, even on Earth (though he was in close proximity to Number ruins at the time). The only exception is when his Baria Lapis is damaged.[10] Long ago, Dumon was a knight who served to protect a kingdom he lived in along with his pegasus, Mach.[11] He was friends with the ruler of the United Lands of the Poseidon Ocean, Nash. When Nash's kingdom was attacked by Vector's forces, Dumon arrived to assist. He was targeted by Vector's archers, but he and his pegasus were too quick to be hit by the arrows. Nash's sister Marin was taken by the ocean god that Vector Summoned, Abyss. Dumon attempted to save her, but Marin pitched herself from Abyss' hand, sacrificing herself to call forth another another god.[12] Dumon then stood by Nash's side as he mourned his sister's death. He then assisted Nash's army in assaulting Vector's once more. The assault led them to a town Vector ravaged on his way, which sickened Dumon as he allowed his people to live in such conditions.[13] As the war between the two kings prolonged, Dumon and Nash planned to confront Vector and his military once they reached his location. Dumon fought and lead Nash's army in the battle and was the only known survivor.[14] At one point in his life, Dumon obtained a card called "Number 44: Sky Pegasus".[15] Eventually, he returned to his homeland, but learned about how his fellow knights had grown arrogant and plotted to usurp the King. Dumon and Mach intercepted the other knights and tried to reason with them, but Dumon failed and the knights turned their swords on him. Since Dumon was unwilling to kill his former comrades, both master and steed were eventually defeated and killed. However, Dumon's fellow knights regretted their actions and they buried him and Mach together (in the English Dub, the burial scene is cut, and Dumon and Pegasus' death is phrased indirectly with both of them having "left this earthly realm together").[11] The knights had been hypnotized by Don Thousand in an effort to cause Dumon's rebirth as a Barian. An unknown number of years later, Thousand reincarnated him as one of the Seven Barian Emperors, as his soul was one that was connected to a Mythyrian "Number" card, which had sealed Thousand's power.[16] Dumon had no memory of his previous life due to the "Over-Hundred Number" that he received from Don Thousand.[17] After their leader Nash disappeared, Dumon assumed command of the Barians.[4] The Emperors plotted to obtain the Numeron Code before Astral by gathering the "Numbers".[5] Due to both worlds being made of energy, they could not interact, so they could not take "Numbers" directly.[5] After Vector's plan of using humans such as Vetrix and Dr. Faker failed, Dumon determined they would have to intervene themselves. Dumon uses a "Star Seraph" Deck, focused around quickly summoning his ace monster, "Number 102: Star Seraph Sentry" through cards such as "Star Seraph Sage" and "Star Seraph Scout". He later gains the ability to perform a Chaos Draw to use "Rank-Up-Magic - The Seventh One", allowing him to Rank-Up "Star Seraph Sentry" from either his Graveyard or Extra Deck and Summon its evolved form.