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ZONE Z-one is the the founder and leader of Yliaster itself, as a mean to set the course of history. [[Sherry]] described him as a man wielding the "Power of a god who reigns over Time itself". Furthermore this power that is said to be able to destroy everything.

[[File:5Dx135 ZONE.jpg|thumb|left|Full view of ZONEZ-one.]]ZONE Z-one is contained in a machine shaped like either a comma, the number six, or a [[Wikipedia:Magatama|Japanese magatama]] (depending on its position). The backside and front-side resemble the [[Yusei Go]]'s, with all markings identical to that of the Duel Runner, albeit in the exact opposite color scheme ''(white with red instead of red with white)''. A more humanoid figure is inside the machine, whose face is mostly covered, but only a portion around his eye is visible, which is the same color, shape, and position as [[Yusei Fudo|Yusei's]] eyes. The figure has a marking similar to Yusei's [[criminal mark]]. ZONEZ-one's helmet/head also is exact to Yusei's helmet ''(including the yellow diamond in the center front)'', but also opposite color scheme ''(white instead of red)''. His human outfit also shares design with Yusei's jacket, for instance the two gem-like garments on it's collar. A notable fact is when he is upside down, in his comma form, he appeared to help Yusei and co. He saved Yusei, Bruno and [[Sherry LeBlanc]] from being blown up in Sector Security. He also gave Yusei his "[[Shooting Star Dragon]]" in order to defeat [[Primo]]. Since then, he has been shown in his right side up position, plotting to erase [[New Domino City]] and kill the [[Signers]], along with [[Aporia]] and Sherry. ZONE Z-one appears to have [[Duel Monsters]] cards in the blue canisters that are on his machine body, it is unknown as of yet what these cards are or what they do for ZONEZ-one.[[File:5Dx144 ZONE Yusei.jpg|thumb|right|ZONEZ-one, taking the form of Yusei Fudo]]ZONE Z-one has also taken the form of [[Dr. LeBlanc]].

In Episode 144, ZONE Z-one appeared dressed as Yusei Fudo and riding the [[Yusei Go]]. However, the red design on the inner shirt is altered somewhat from Yusei's usual design (the alteration being that is still the same design in every way except ''"completed"'' with the "missing leg" forming a gateway-like design rather than the half-circle it normally is), as well as the orange patches on his collar that are normally round were square. His version of the Yusei Go possesses similar small differences, with different coloring for the duel disk arm, different framing over the wheels, and what appears to be a gun-type weapon mounted on the seat on the right side.

[[File:Zone.png|thumb|left|A human eye and face inside the machine with grey hair.]] Some of ZONEZ-one's face has also been revealed. It is shown that he is a very old man and has grey hair.

[[File:Zone fulbody.png|thumb|right|ZONEZ-one, before he entered his machine form.]]ZONE Z-one comes from the apocalyptic future devastated by [[Synchro Monsters]] and "[[Machine Emperors]]".During that time, it is revealed that ZONE Z-one himself rescued Antinomy when he was about to die at hands of one of these robots. The two of them along with [[Aporia]] and [[Paradox]] became the last survivors of the human race.

During the [[WRGP]] finals, Aporia shows [[Team 5D's]] this vision of the future he came from. In this vision, ZONE Z-one along his two comrades appear before Aporia and asks for his help.

ZONE Z-one is later made into a God with the assistance of Aporia, Antinomy and Paradox. When Aporia, Antinomy and Paradox are put in capsules because of their old age, Aporia begs ZONE Z-one to use his powers to stop the future from happening at all costs. Before Aporia dies as well, he insists to ZONE Z-one to split him into three embodiments based on the three despairs of his life. ZONE Z-one promises that he would (and later does so in the form of the [[Three Emperors of Yliaster]]).

ZONE Z-one first appeared when [[Sherry LeBlanc|Sherry]] and [[Bruno]] attempted to scan her "[[Z-One]]" card, warping them and [[Yusei Fudo]] to a computerized world. After they all woke up near a lake along with [[Elsworth]], Yusei speculated that it has something to do with [[Yliaster]].

Later after reaching a [[Clear Mind]], Yusei finds "[[Shooting Star Dragon]]'s" Tablet outside the city, upon touching it he is once again transported to where ZONE Z-one is. It is there that ZONE Z-one gives him the respective card.[[File:ZONELEBLANC.jpg|thumb|right|ZONEZ-one, taking the form of Sherry's father.]]This is because he has obtained an alternate possibility, meaning [[Accel Synchro]] and that same card has the possibility towards it. This is one of the requirements for Clear Mind. ZONE Z-one states that Yusei has the right to take it, as he departs saying that "all possibilities must be made equal".

Later, after being separated from Yusei and [[Bruno]], [[Sherry LeBlanc]] winds up in the company of ZONEZ-one, in the form of [[Dr. LeBlanc|her father]]. ZONE Z-one promises Sherry he'd tell her the entire truth of what's going on, but she'd have to accept her fate being altered.

ZONE Z-one reappears in [[Yu-Gi-Oh! 5D's - Episode 131|episode 131]] showing Sherry the future caused by [[Ener-D]]. Later on, [[Primo]] reveals that it was ZONE Z-one who rebuilt/resurrected him.

After Yusei defeats Aporia, the [[Grand Design]] is completed, allowing the [[Arc Cradle]] in the sky to descend upon New Domino City. ZONEZ-one, along the human bodies of Paradox, Antinomy, and the real Aporia, is are within the Arc Cradle, and recovered the remains of Aporia's mechanical body. There ZONE Z-one tells Aporia that although he was defeated, he did not fail completely because the Arc Cradle managed to appear, and some things have changed. ZONE Z-one then asks Aporia if he is willing to try to change the future again, to Aporia agreeing to help, because he is ZONEZ-one's 'eternal friend'.

As both Yusei and Bruno reach the Third Planetary Gear, ZONE Z-one makes Antinomy remember everything, so that he can duel Yusei.

Moreover his technology also allows him to harness [[EnerdyEner-D]] through duels, which fuels the [[Grand Design]] to summon the Arc Cradle. He is also capable of creating cyborgs in the appearance of his deceased friends, all of these cyborgs are potent duelists in their own right, Aporia also has shown the ability to merge with his duel runner, if the others can it is unknown. Sherry stated that he is capable of granting any wish, even that Sherry met with her deceased parents, if this means he can resurrect people, create another reality or mere exaggeration it is unknown.

It is also unknown how but he was capable of turning the very Machine Emperors that destroyed his world in into cards for the Emperors of Yliaster and send them through Stone Tablets, and also Shooting Star Dragon through the (suggested to be) same methods, although this could be part of the many experiments he and his comrades made.

| [[Aporia]] || [[Yu-Gi-Oh! 5D's - Episode 146|146]] - [[Yu-Gi-Oh! 5D's - Episode 147|147]] || TBA

ZONE Z-one uses a '''[[Temporal Machine Gods|Temporal Machine God]]''' Deck, apparently focused in the [[Burn]]/[[Bouncing]] play style, to return the opponent's monsters in the opponent hand, having cards that reduce damage to 0, and inflict damage for each monster returned. He also uses [[Trap Card|Trap Cards]] that activate directly from his hand.