| en_voice = {{Voice actors|en|Michael Smith}}<ref>{{cite web |title=Vetrix Character Profile |url=https://yugioh.com/characters/vetrix |website=Official Yu-Gi-Oh! Site |access-date=15 June 2022 |language=en}}</ref>

Though his appearance is that of a child younger than the rest of the [[Vetrix Family]], he is their father. He was betrayed by Dr. Faker, who used him and [[Kazuma Tsukumo]] as sacrifices to open the door to another dimension. When he returned, he his form was de-aged mutated into that of a child.<ref name="ep55" />

Unmasked, the right left side of Vetrix's face is covered by a strange, dark void that seems to be slowly consuming it. His forehead also has markings on it similar to those on the forehead of "[[Number 69: Heraldry Crest (anime)|Number 69: Heraldry Crest]]".<ref name="ep66">{{episode|Yu-Gi-Oh! ZEXAL|66|ref}}</ref>

Vetrix is capable of manipulating the augmented reality system with his Barian powers, as shown during his Duel with Dextra and when he also restrain Yuma with chains from the [[Barian World]].<ref name="ep58">episode|Yu-Gi-Oh! ZEXAL|58|ref}}</ref>

Faker told them he would find the door to the parallel dimensions at any cost. Kazuma asked if Byron and Faker weren't close friends and Faker responded that if Byron is really is his friend, he should be happy to be sacrificed. Faker told Byron that average people like him could hope for no more than that. As Byron and Kazuma fell through the portal, Byron swore revenge against Faker.<ref name="ep55" /> While wandering through the alternate dimension, he nearly gave up hope many times. He recalled Kazuma's talk of friendship and of never giving up, though he considered Faker's betrayal as proof of the uselessness of friendship, but found Kazuma's mantra of never giving up to be inspiring. Sustained by the hope of attaining revenge,<ref name="ep65" /> he survived through his own will and with the help of the [[Barian World]].<ref name="ep58" />

While trapped there, he was rescued by a group of [[Barian]]s, [[VectorDumon|one]] of them whom granted him Barian power in exchange for him agreeing to help collect the "[[Number]]s" and destroy the [[Astral World]], as beings from the Barian World could not interact with it themselves.<ref name="ep74" />

He eventually returned to Earth, but his form was mutated into that of a child and he took the alias "VetrixVertex".<ref name="ep55" /> He began to devise a machination per his deal with the being from the Barian World, also deciding to use the opportunity to take revenge on Faker<ref name="ep26" /><ref name="ep74" /> as the latter believed him to be dead.<ref name="ep34">{{episode|Yu-Gi-Oh! ZEXAL|34|ref}}</ref> He granted each of his sons a [[crest]], which imbued them with great powers. However, they were directly tied to their souls, so should they lose a Duel while wielding a powerful "Number", their souls will be exhausted and they will fall comatose.<ref name="ep65" />

During the Duel between [[Yuma Tsukumo|Yuma]] and [[Nash]], the Astral and Barian Worlds were close to colliding and destroying both. Vetrix appeared in the Barian World (now fully fused with [[Earth (planet)|Earth]]), while [[Kazuma Tsukumo|Kazuma]] appeared in the Astral World. Kazuma thanked Vetrix, saying that his sons had helped Yuma grow into a fine young man. Vetrix thanked him in turn, as Yuma helped him get his family back. Vetrix determined they had to find a way to stabilize the worlds long enough for the Duel to come to its conclusion. Kazuma agreed, and the two entered energy forms of the same colors used by Yuma and Astral before using [[ZEXAL (power)|ZEXAL]]. They used the last of their powers to become barriers between the arena and the two colliding worlds. Vetrix's crest shined out (now pink once again), while an image of the [[Emperor's Key]] shined out for Kazuma.<ref name="ep142">{{episode|Yu-Gi-Oh! ZEXAL|142|ref}}</ref> After the Duel's end, Vetrix and Kazuma reappeared, with Vetrix stating the Earth had begun to drift away from the Astral World. Kazuma thanked Vetrix for his help, calling him "old friend". Vetrix mused he had repaid some of the debt from his earlier actions before vanishing where he sent back to Astral World.<ref name="ep144">{{episode|Yu-Gi-Oh! ZEXAL|144|ref}}</ref> Some time after Yuma's and [[Astral]]'s Duel, he started working together with a revived Quinton, Kite and [[Dr. Faker]] to research parallel worlds again. Upon hearing about the Astral World's crisis, Vetrix joined Yuma and his friends on the journey there.<ref name="ep146">{{episode|Yu-Gi-Oh! ZEXAL|146|ref}}</ref>

| [[Pepe Perez]], [[Lord Percius]], and [[Count Crazy Fang]] || [[Yu-Gi-Oh! ZEXAL - Episode 053|53]] || Win([[Duel Coaster]])|-| [[Dextra]] || [[Yu-Gi-Oh! ZEXAL - Episode 054|54]] || Win ([[Jungle Field]])

| [[Yuma Tsukumo]] || [[Yu-Gi-Oh! ZEXAL - Episode 065|65]]-[[Yu-Gi-Oh! ZEXAL - Episode 067|67]]|| Lose([[Sphere Field]])