List of Yu-Gi-Oh! 5D's Characters - Antagonists - Yliaster

Originally led by Goodwin, Yliaster (イリアステル, Iriasuteru?) was an organization of Star Guardians, who are said to bring peace to the world and worship the Crimson Dragon. Their true purpose, however, is to steer the world to change the future, which was destroyed by Dr Fudo's creation of Ener-D (Momentum in Japanese). In the third season, the founding Yliaster members come from the future with the purpose of setting things right. They hope to accomplish this by harnessing energy from Turbo Duels during the WRGP to power the Ark Cradle, which will be used to destroy Ener-D, and ultimately New Domino City and Satellite, and thus undo the calamity Ener-D had caused.

Z-ONE (ゾーン, Zōn?) Voiced by: Hideo Ishikawa

Z-ONE is the leader of Yliaster, who is a mysterious figure that Three Emperors of Yliaster revere. He is the one who give them life, and he also gave them the Meklord Emperors. However, Z-ONE gave Yusei Shooting Star Dragon, and created Antinomy to make all possibilities equal for both sides. Along with Aporia, Paradox and Antinomy, Z-ONE was one of the four last remaining survivors of a future destroyed by a Meklord Emperor-Synchro Monster War and a global Ener-D explosion. When Aporia, Paradox and Antinomy died of old age, Z-ONE revived them as cyborgs in order to help him rewrite the future, which involves the destruction of New Domino City. As Z-ONE battles against Yusei, he is shown to have the face of an older Yusei. When the Synchro War began, Z-ONE performed an operation on himself to gain the appearance and abilities of Yusei, so he could help as many people as possible. Z-ONE fell into despair when he wasn't able to. Thus, he believes the only way to save the world is to destroy New Domino City in the past. However, after losing to Yusei and getting a change of heart, Z-ONE sacrifices himself to stop the Ark Cradle from destroying the city. Z-ONE uses a Time Lord Deck, made up of giant cards formed from stone tablets and handled with giant mechanical arms. These cards specialize in burn damage. He also has Trap cards that can be activated from his hand. His main cards are his ten Time Lord Monsters that can only stay on the field for one turn but have devastating effects. His ace monster, Sephylon, the Ultimate Time Lord, can remain on the field indefinitely and gains attack points equal to the number of Time Lords on his field, including itself.

Aporia (アポリア, Aporia?)

Voiced by: Masakazu Nemoto, Takayuki Sugō (old), Hitomi Yoshida (child) (Japanese), Jason Anthony Griffith (English)

Aporia is a cyborg from the future, one of the last remaining humans after the Ener-D explosion. On the verge of death, Aporia allowed Z-ONE split him into three incarnations, in order to go back into past and alter it. The three incarnations, known as the Three Emperors of Yliaster, are also known as the three tragedies of Aporia's lifetime, because they are the embodiments of intregral moments of his despair. During the end of the WRGP, the Three Emperors combined back into Aporia, who appears in the peak of his life. Aporia duels against Yusei and loses, with his body being damaged as a result. He is repaired by Z-ONE and duels Jack, Leo and Luna in order to protect the Ark Cradle. He is defeated by them, and they show him that hope is stronger than despair. As a result, Aporia becomes filled with hope and decides to face Z-ONE in a duel. Aporia loses and is destroyed as a result. His Turbo Deck is a composite of the Emperors' Meklord Emperor decks, which have the ability to absorb Synchro Monsters, along with the strongest Meklord Emperor, Meklord Astro Mekanikle. His Standing Deck focuses on effect damage, and features Meklord Armies, and his key monster, Meklord Astro Dragon Asterisk.

Jakob / José (ホセ, Hose?) Voiced by: Takayuki Sugō (Japanese), Matt Hoverman (English)

Jakob is the defacto leader of the Three Emperors of Yliaster. He is the incarnation of Aporia's later years, and his despair of being one of the last four living humans in his time. His ace monster is Meklord Emperor Granel, which can use the power of the Synchro Monsters it absorbs.

Lester / Lucciano (ルチアーノ, Ruchiāno?) Voiced by: Hitomi Yoshida (Japanese), Tom Wayland (English)

Lester is the incarnation of Aporia's preteen years, and his despair of becoming an orphan. Lester's ace monster is Meklord Emperor Skiel. He is the youngest in the group, with long red hair and a rather sadistic personality. He is particularly skillful at creating illusions. He transfers into Duel Academy in order to get close to Luna, and ends up dueling both her and Leo. After the duel, Lester wipes the memories of the Duel Academy students so they behave like he doesn't exist. He is also the first character in the series to use a Duel Board.

Primo / Placido (プラシド, Purashido?) Voiced by: Masakazu Nemoto (Japanese), Jason Anthony Griffith (English)

Primo is the incarnation of Aporia's late teenage years, and his despair of losing his girlfriend. His ace monster is Meklord Emperor Wisel. He has dark-gray hair and the ability to control machines. He carries a sword that can be used to open portals, or can be used as a futuristic duel disk. He has Lazar steal a Duel Runner program from Yusei, and install it into a large number of Duel Bots. He eventually uses these Duel Bots to force Turbo Duelists to crash, in order to speed up a process that Yliaster was planning. Primo is eventually defeated by Yusei and is critically damaged, but Z-ONE repairs him.

Antinomy (アンチノミー, Anchinomī?) Voiced by: Tanaka Hiroki (Japanese), Jason Anthony Griffith (English)

Antinomy, born Johnny (ジョニー, Jonī?), is a technical genius. He was present the day Ener-D overloaded and he was saved by Z-ONE, who later converted Antinomy into a cyborg. He was tasked to protect Yusei and teach him Accel Synchro so Yusei's power can revive Ark Cradle, with some of his memory being erased in order to better earn Yusei's trust. He is first introduced only as Vizor (Dark Glass) in his adult form, who informs Yusei about Accel Synchro prior to crashing during a duel with Primo. He is found by Sector Security in his teenage form. Going by the name Bruno (ブルーノ, Burūno?)), he is sent to live with Yusei, where his abilities as a super mechanic are shown when he improves the gang's Duel Runners. Later, when he comes across a kitten that caused him to crash, he regains his memory as Vizor, and finishes teaching Yusei about Accel Synchro. When he accompanies Yusei to the Ark Cradle, he regains his full memory as Antinomy, and challengse Yusei to a Turbo duel. Antinomy loses the duel and is engulfed in the Ark Cradle's artificial sun. Complimenting his technique is his T.G.(Tech Genus) Deck, which is designed to frequently summon monsters. These monsters are used for multiple Synchro Summons in order to summon his Accel Synchro Monster, T.G. Blade Blaster. He is also able to perform a more advanced technique called Delta Accel Synchro (which uses three Synchro Monsters) to summon his ace monster, T.G. Halberd Cannon.

Paradox (パラドックス, Paradokkusu?) Voiced by: Atsushi Tamura (Japanese), Sean Schemmel (English)

Paradox is a turbo duelist, who travels across space and time, and he is one of the last survivors, along with Z-ONE, Aporia and Antinomy. He appears in Yu-Gi-Oh! 3D: Bonds Beyond Time as the main antagonist, trying to destroy the history of Duel Monsters in order to save the future. However, he ends up causing more damage to the timeline than expected. He attempts this by stealing monsters across time, including Yusei's Stardust Dragon, and converting them into powerful Malefic monsters, so that he can kill the creator of Duel Monsters, Maximillion Pegasus. However, Yusei, along with Yugi Mutou and Jaden Yuki, defeat him in a three-on-one duel, thereby reversing all the damage Paradox caused to the timeline. Following his defeat, Paradox disappears into the recesses of time, never to be seen ever again, but not before he ponders all of the events he caused, and if his intervention was worthwhile. Paradox uses a Malefic deck made up of Malefic counterparts of monsters that he steals throughout time, including Malefic Cyber End Dragon, Malefic Rainbow Dragon, Malefic Stardust, Malefic Blue-Eyes White Dragon,Malefic, Red-Eyes Black Dragon, his own monster, Malefic Paradox Dragon, and his ace monster, Malefic Truth Dragon, which he can fuse with.

Clark Smith (クラーク・スミス, Kurāku Sumisu?) Voiced by: Manabu Sakamaki

Clark is the director of the Ener-D Express Development Agency, the company that helped send the Three Emperors to New Domino City. He was placed in charge of a project called Infinity, which can create wormholes. He is responsible for the death of Sherry's parents, who reportedly knew too much about Yliaster. However, when he went against Yliaster's wishes to eliminate Yusei, Clark is erased from existence by the Three Emperors. Clark uses a geometric deck.

Fake Jack Atlas (偽者ジャック・アトラス, Nisemono Jakku Atorasu?) Voiced by: Takanori Hoshino (Japanese), Ted Lewis (English)

Fake Jack Atlas is a robotic imposter that frames Jack for forcing people to crash during duels. He rides a Duel Runner similar to Jack's Phoenix Whirlwind (Wheel of Fortune in the Japanese version) and uses a deck identical to his, with three copies of Red Dragon Archfiend (that for some reason are purple, yellow and blue instead of red, but none of the characters seem to realize this fact). His personality and tactics, however, are more representative of Jack's prior to his defeat at the hands of Yusei, at the end of the Fortune Cup. He uses brute force to overpower his opponents. He is obliterated when Jack defeats him using Majestic Red Dragon. He is revealed to be a Duel Bot, like Ghost, when he is obliterated by the outcome of the duel between him and the real Jack.

Guard Robot (ガードロボ, Gādo Robo?) Voiced by: Suzune Okabe (Japanese), Dan Green (English)

Guard Robot is a giant duel robot that uses an advanced program to predict its opponent's moves, and uses a Lock Down deck designed to seal off various methods of dueling.

Ghost (ゴースト, Gōsuto?) Voiced by: Kawanago Masahito (Japanese), Jason Anthony Griffith (English)

Ghosts are Duel Bots (Riding Roids in Japanese), robots originally designed for testing Duel Runners for Sector Security, but which have since been reprogrammed by Primo to force other duelists to crash in Turbo Duels. While the first Ghost was defeated by Yusei, Primo steals a program created by Yusei and Bruno, and installs it into an army of Ghosts (collectively known as the Diablo) that he releases throughout the city.