Shark’s basic associate with Quattro is at the brand new Federal Duel Circuit, in which he was Shark’s challenger on the final fits, that he won of the disqualification. The guy becomes Shark’s address out of revenge when he revealed that the guy place Shark up getting disqualification of the place his Deck to ensure that Shark often see they, and you may is the main one guilty of Rio’s injuries.  Shark inserted the country Duel Carnival receive payback for the Quattro, spending in most cases pursuing him. Once they do see, Quattro takes fulfillment regarding mocking Shark and provoking him, whilst is a portion of the his family’s intentions to play with Shark and work out their hatred develop.  
Faker instead of him. At the WDC party, Quattro experienced Shark out-of rage, in order to expand more irritated when Shark teased him before you leave.  Regarding finals, it went on so you can induce both just like the Quattro provided Shark so you can this new “Magma Community” for their rematch Duel.   Away from outrage, Quattro brutally Dueled against Shark to demonstrate his father that he try better than him.  Just after Quattro lost so you’re able to Shark, the guy apologized to have their mistakes and you will trusted Shark into the activity out-of conquering Vetrix, hence simply angry Shark. Their payback and you will outrage upcoming shifts to Vetrix, when he are the person who orchestrated everything. 
Shark afterwards reunited that have Quattro as he came to assist him having Duel against Chironex and you can teamed right up him. The 2 opponents setup an amount of companionship, although they tend to exchanged insults to one another, hence made Trey commented that it was tough to figure out once they have been on an effective otherwise crappy terminology.   When Shark sided on the Barians since the Nash and you may bankrupt their ties having humanity, Quattro are calculated to help you Duel up against the just individual the guy named a friend managed restore the ties Nash used to have.  Immediately following Nash presented just how Quattro’s allies perished in their Duels which have brand new Barians, Quattro is actually disgusted in the how far Nash had dropped and you can acknowledged which he was no more Reginald.  Even in the event Quattro attempted one final time to obtain “Reginald”, straight back he had been unproductive, and also as their spirit headed into Barian Industry, the fresh new competitors bid an unfortunate farewell to each other, having Nash guaranteeing to become listed on Quattro for the Heck after the war concluded.  Although not, they end up being nearest and dearest once more immediately after Yuma and you may Astral’s duel.
Dumon [ revise ]
Throughout the their period just like the Emperor of your United Countries of one’s Poseidon Sea, he previously befriended good knight away from various other kingdom. This knight, Dumon, came into existence close having Nash LDS Dating-Seiten, swearing to defend and battle next to your and his awesome enemies. 
Its relationship even continued to its 2nd life, when the a couple of guys was reincarnated due to the fact Barians where Dumon manage continue steadily to suffice Nash once more. Despite Nash got purportedly gone away about Barian world, Dumon (now commander of your most other Barians) held onto the promise its chief carry out come back someday. Just after Vector got stated the potential for its forgotten leader are on earth, Dumon became positively computed discover and give his leader right back.  
Just after they turned into visible you to definitely Nash have been the human Shark, Dumon were able to convince your it absolutely was his fate in order to join the Barians, finally Nash got joined him once again. 
Vector [ modify ]
Shark and you will Vector try arguably arc-enemies; having a shared hatred spanning far-back towards the old early in the day. In their earlier in the day lifetime, Vector is this new Prince of the country one invaded this new Joined Lands of one’s Poseidon Ocean, which had been ruled of the Shark’s prior life– Nash. It generated Vector yourself responsible for slaughtering Nash’s Kingdom playing with his beast military. To your a private top, Vector’s invasion pushed Nash’s brother Marin to compromise herself to summon the ocean God Crystalzero, that has been a source of immense despair to have Nash. In the event the several was in fact at some point restored just like the Barians, their genuine thoughts was indeed closed aside by the Wear Thousand, therefore, the duo didn’t admit one another instantly. Although not, the mutual hatred permitted also in their the latest identities, Nash disliking Vector to own his ongoing defiance. Vector fundamentally went so far as to establish a beneficial “Point system” each big date Nash crazy your (and you may undoubtedly everything Nash said otherwise did upset your), ultimately deciding to betray their leader in the 100,100000,000 things.