Iliaster's Four Stars of Destruction

The The Four Stars of Ruin of Yliaster, are the last 4 surviving members of humanity from the Meklord Emperor genocide 200 years in the future, who aim at all costs to stop the bad future from happening by conducting many plans, and serve as the final group of antagonists in Yu-Gi-Oh! 5D's.

History
After taking the form of Yusei, Z-one manages to save Antinomy (real name Johnny) from certain death from a Granel with a cannon on his Duel Runner. After that, Antinomy joined Z-one, and the two of them at some point later meet and recruit a man going by the code name Paradox.

Much later, the 3 (now elderly men) stumble upon a 4th survivor, an elderly man going by the code name Aporia. Aporia is soon inducted into the group, and the 4 of them begun conducting many experiments to try and save the future from its disastrous fate. Unfortunately, one by one they eventually die of natural causes, unable to fix the future in their lifetimes. First it was Antinomy, then Paradox, and finally Aporia died, leaving Z-one as the last surviving human of the future. On their deathbeds each one of them proclaimed they wanted to lend their strength to Z-one, and he had constructed android copies of them to assist him in his plans, however Aporia was special in the fact that instead of having one, he wanted Z-one to use 3 copies of him; one at vastly different ages; ones he considered to be the 3 despairs of his life.

After having created the 5 different copies of his friends; Z-one had gave them all different missions to help save the future; The 3 copies of Aporia were sent into the past to stop Momentum from causing the ruined future; initially causing the Zero Reverse at the time of its discovery, and much later to complete the Circuit by using the power of the Signers to summon the Ark Cradle to crash into and destroy New Domino City. Paradox was sent into the past to kill the creator of Duel Monsters, Pegasus to stop Duel Monsters from ever being created in the hopes it would lead to a the future being changed. Finally, Antinomy was sent to the past to guide Yusei to discover a new power, Accel Synchro (and later Delta Accel Synchro) to hopefully find an alternative method of Synchros that wouldn't cause humanities destruction. Ultimately, they all fail in their missions and die. Paradox after being confronted by Yusei, Jaden and Yugi is destroyed upon losing a duel. Antinomy after losing to Yusei aboard the Arc Cradle, is such into a black hole and is killed when his Duel Runner explodes. The 3 copies of Aporia merge back into one and after being defeated twice (first by Yusei, and a second time by Jack, Leo and Luna) he has a change of heart and duels Z-one on behalf of Yusei and friends, believing in the hope they will provide an answer to the future in less violent means. He is defeated, and as his body is already heavily damaged dies, but not before providing Yusei with the means to flight in order to fight Z-one. Z-one, being the only one left has a final battle with Yusei, in which he eventually loses, after which he entrusts the fate of the future to Yusei. As Yusei plans to sacrifice himself to stop the Arc Cradle, Z-one instead throws Yusei out of the way and slams into the reactor causing it to dissapear, at the cost of his life; his final thoughts being that he will soon join his deceased friends.

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