Changes

| ja_voice = {{voice actors|jpja|Shogo Yano}}

Immediately after Pendulum Summoning for the first time, he became fascinated by the newly discovered Summon type. He quickly called it "the best" and went great distances to obtain [[Pendulum Monster]]s. At one point he even claimed he was the first Duelist to Pendulum Summon<ref name="ep54">{{episode|Yu-Gi-Oh! ARC-V|54|ref}}</ref> and bragged about Pendulum to [[Security]] while in the [[Synchro Dimension]].<ref name="ep56">{{episode|Yu-Gi-Oh! ARC-V|56|ref}}</ref>.

In the Japanese version, Sylvio tends to add a large number of English phrases to his speech and speaks rather brashly and rudely, sometimes even addressing himself as "ore-sama" which is a very boastful and egotistical personal pronoun in Japanese. In the English dub, his occasional spouts of English are changed to French and his overall manner is far more posh and polite but still arrogant. In that version, Sylvio has a slight British accent.

[[File:Silvio stealing Yuya's Pendulum Monsters.png|right|thumb|250px|Sylvio steals [[Yuya Sakaki|Yuya]]'s [[Pendulum Monster]]s.]] After class one day, he approached Yuya and his friends, throwing three sucker-tipped darts at Yuya before introducing himself, stating that he was a fan of Yuya and his [[Pendulum Summon]]ing. Yuya was going to show his friends a Pendulum Summon at his own [[You Show Duel School|Duel School]], but Sylvio offered the use of the Center Duel Field at [[Leo Institute of Dueling|LID]]. [[Zuzu Boyle|Zuzu]] wasn't happy about it, but Yuya's other friends all agreed, and Sylvio showed them around the school before he took them to the Duel Field. There Yuya and his friends were met by Sylvio's crew of friends: [[Ootomo]], [[Yamabe]], and [[Kakimoto]]. Sylvio asked to show his crew Yuya's Pendulum Monsters, and Yuya reluctantly showed him his "[[Stargazer Magician (anime)|Stargazer Magician]]" and "[[Timegazer Magician (anime)|Timegazer Magician]]." Sylvio promptly swiped them and showed them to his crew, before announcing his intention to keep them. He offered Yuya the chance to Duel to get them back, much to the anger of [[Claude]], who was monitoring Sylvio for Declan. Declan allowed Sylvio to Duel Yuya. Sylvio tossed Yuya some of his [[common]] cards to replace his Magicians, calling them trash cards. To ensure that Yuya would Duel, Sylvio had Yuya's friends placed on top of one of the towers in "[[Prison Tower of Darkville]]," endangering them with the prospect of their perch being damaged by [[Action Card|Action]] [[Trap Card]]s. On the first [[turn]], Sylvio drew "Timegazer Magician," but was instructed by Declan to keep it in his hand instead of playing it right away. Instead, he Summoned "[[Lightning Hoverboard]]" and pursued Yuya, destroying his "[[Performapal Whip Snake (anime)|Performapal Whip Snake]]" after it was weakened by Action Trap Cards. Yuya continued to play defensively, but to no avail; on Sylvio's next turn he drew a card that allowed him to [[add a card|add]] "Stargazer Magician" to his hand and he proceeded to Pendulum Summon his "[[Dart]]" monsters with Declan's assistance. Sylvio was amazed at the Summon, declaring himself a chosen one.<ref name="ep3" />

[[File:Arc V Silvio and Declan.png|thumb|left|250px|Sylvio Pendulum Summons with help from [[Declan Akaba|Declan]].]]

After his defeat, he acquired new cards that he tested out against one of his crew. They praised him, calling the cards strong, but Sylvio corrected them, claiming that it was him that was strong and stating that he had all the qualities of a "Perfect Duelist." After he used a few expressions similar to those that Yuya had used his friends wondered if Yuya had rubbed off on Sylvio, but he denied it and vowed he would crush Yuya. He was later seen hanging out with his crew in an abandoned warehouse, waiting for his friends to bring him his favorite food, and chastised his friends for being late.

[[File:Arc V Silvio choking on his food.png|thumb|right|250px|Sylvio chokes on his foodwhen Zuzu arrives to stop him.]]

[[File:Arc V Silvio's jacket pierced.png|thumb|left|250px|Sylvio's jacket pierced by "[[Phantom Knights' Spear (anime)|Phantom Knights' Spear]]".]]

[[File:Arc V Silvio dressed in Mabuta no Haha.png|thumb|right|250px|Sylvio cosplays as "Mabuta no Haha" prior to his match with Yuya."]]At the Championship, he accompanied the Course representatives and [[Shay Obsidian|Shay]]. His first Duel was to be against Yuya the next day.<ref name="ep27">{{episode|Yu-Gi-Oh! ARC-V|27|ref}}</ref> Sylvio entered the arena the next day dressed in homage to ''Mabuta no Haha'', proclaiming himself the world's greatest [[Duelist]], and calling himself "Neo New Sawatari." Sylvio claimed that [[Pendulum Summon]]ing would be Yuya's downfall, and pointed out his (unfounded and quickly disproven) grudges against Yuya. They began their Duel, with Sylvio unveiling his new "[[Yosenju]]" [[Monster Card|monsters]]. Yuya Pendulum Summoned next turn and fought back, but Sylvio used his "Yosenju" cards to deny him [[Action Card]]s and add "Yosenju" Pendulum Monsters from his Deck to his hand and Pendulum Summoned "[[Mayosenju Daibak (anime)|Mayosenju Daibak]]." He then [[activate]]d his "[[Dizzying Winds of Yosen Village (anime)|Dizzying Winds of Yosen Village]]" to [[send]] the cards bounced to Yuya's hand back to his Deck instead, and cleared his [[field]] when the self-returning effects of his "Yosenju" monsters triggered his "[[Yosen Whirlwind (anime)|Yosen Whirlwind]]", returning the cards to Yuya's hand and thus to his Deck. Despite his pinch, Yuya simply laughed and [[Set]] his remaining cards, and then turned to find more Action Cards.<ref name="ep31">{{episode|Yu-Gi-Oh! ARC-V|31|ref}}</ref>

[[File:Arc V Silvio and Yosenju's brothers.png|thumb|left|250px|Sylvio and his "[[Yosenju]]" [[Monster Card|monsters]].]]

[[File:Yuya and Sawatari.png|thumb|right|250px|Sylvio graciously accepting his loss to [[Yuya Sakaki|Yuya]].]]

[[File:Silvio electrocuted.png|thumb|left|250px|Sylvio electrocuted upon paying the 2000 [[LP]] penalty.]]During the [[Battle Royal]], after the video feed for all of the areas were cut, Sylvio took advantage of his father's influence to barge into Declan's control room and ask what was going on because he wanted to see how far in the tournament Yuya would get. Declan allowed him to stay and offered him a chance to take place in a revival match.<ref name="ep47">{{episode|Yu-Gi-Oh! ARC-V|47|ref}}</ref> Declan explained the situation regarding [[Celina]], [[Shay Obsidian|Shay]] and the invading [[Obelisk Force]] to Sylvio and sent him to assist Celina, Shay, and [[Moon Shadow]]. He arrived in time to use an Action Card to save Moon Shadow. He explained why he was there, boasting that Declan had told him everything, but was then shocked by the intrusion penalty of 2000 LP--a LP—a detail that Declan had ''not'' warned him about. Despite this, he claimed that he'd show them why he was "LID's strongest."<ref name="ep48">{{episode|Yu-Gi-Oh! ARC-V|48|ref}}</ref>

[[File:Arc V Silvio using his new Pendulum Cards.png|thumb|250px|right|Sylvio using his new "[[Abyss Actor]]" [[Pendulum Monster]]s.]]

[[File:Arc V Silvio arrested.png|thumb|left|250px|Sylvio gets arrested by [[Sector Security (ARC-V)|Sector Security]].]]He arrived in the Synchro Dimension with Yuya, Celina, and [[Riley Akaba]], and the group were immediately accosted by [[Sector Security (ARC-V)|Sector Security]], claiming that they were wanted for trespassing in [[Topsiders]]-exclusive areas. Unaware as to what the Sector Security members were referring to and incensed by their rudeness, Sylvio rashly challenged them to a Duel despite Yuya's protests.<ref name="ep55">{{episode|Yu-Gi-Oh! ARC-V|55|ref}}</ref> He was swiftly taken out with a [[One Turn Kill]] and apprehended, and when Yuya Dueled another Sector Security officer, he bragged about [[Action Card]]s and [[Pendulum Summon]]ing, inadvertently alerting the officers to the function of Action Cards. Although Celina defeated her opponent, Yuya was put in a tough spot and more Sector Security officers arrived. Sylvio managed to get free and face-off against them, but fortunately they were saved by [[Crow Hogan (ARC-V)|a Synchro Dimension native]] and his gang.<ref name="ep56">{{episode|Yu-Gi-Oh! ARC-V|56|ref}}</ref>

[[File:Arc V Silvio, Selena and Yuya.png|thumb|250px|right|Sylvio, Yuya, [[Celina]], and [[Riley Akaba|Riley]] are invited by [[Crow Hogan (ARC-V)|Crow]] to stay at his place.]]The Synchro user, [[Crow Hogan (ARC-V)|Crow]], invited them to stay at his place until events calmed down, and Sylvio introduced himself as an undefeated Duelist with Yuya as his disciple. Sylvio revealed through his boasts that they were from a different dimension to a confused Crow. [[Frank (ARC-V)|Frank]] and [[Tarren]], two of the orphans that Crow looked after, later returned with stolen food and revealed that they'd seen Yuya and Celina at a café, who Yuya and Celina deduced to be Zuzu and someone named [[Yugo]]. Crow went out to look for them.<ref name="ep57">{{episode|Yu-Gi-Oh! ARC-V|57|ref}}</ref>

[[File:Arc V Silvio and the cook.png|thumb|left|250px|Sylvio tries to convince the cook to give him more food.]]

[[File:Everyone taken away.png|thumb|right|250px|Sylvio and the others are taken away to compete in the [[Friendship Cup]].]]He led them to the roof, where they were cornered by the [[Stomptroopers]]. Sylvio suggested bribing them with rare cards, but Chojiro explained that this wouldn't work on the Stomptroopers Dueling them one-on-three proved difficult for Sylvio, and he fled with Yuya and Chojiro. Trapped on top of a tall tower, Sylvio refused to jump until Chojiro grabbed him and forced him to jump, leaving Yuya to save them. The group were eventually rescued by Gong and Shay, and they linked up with the other escaped Lancers and Commons to swim from the Facility. Unfortunately, [[Jean-Michel Roget]], the Director of Sector Security, had anticipated them and captured Damon's contact, [[Tony Simmons]]. Envoys of the [[High Council]] stepped in to bring the Lancers and the Commons to them, where Declan revealed himself and that he had informed the Council of the Interdimensional War. The Lancers were entered into the Friendship Cup and Yuya was chosen to Duel Jack Atlas in an exhibition match before the start of the tournament. Before being separated from Yuya, Sylvio urged him to show his strength to the Synchro Dimension.<ref name="ep63">{{episode|Yu-Gi-Oh! ARC-V|63|ref}}</ref>

Sylvio watched the Duels on the first day of the tournament, furious that he wasn't being picked but somewhat pacified by the exquisite dinner that he received. He was angry that he still wasn't Dueling on the second day when Yuya Dueled [[Officer 227]], but was concerned when Yuya was close to losing. He was also shocked to learn from Yuya that the losers in the tournament would be sent to the [[Underground Labor Facility]]. <ref name="ep71">{{episode|Yu-Gi-Oh! ARC-V|71|ref}}</ref> When his name was announced for the Duel against [[Yugo]], he was initially angry, not realizing that he'd finally been picked to Duel.

[[File:SilvioVsYugo.png|thumb|left|250px|Sylvio vs. [[Yugo]]]]

[[File:YGO-ARC-V-Ep-72-Img-0005.png|thumb|250px|Sylvio uses his "[[Abyss Script - Opening Ceremony (anime)|Abyss Script - Opening Ceremony]]" to increase entertains the crowd during his [[LP]].Duel with Yugo]]

[[File:SilvioSeesYugoasYuya.png|thumb|250px|left|Sylvio notes how much Yugo resembles Yuya after their Duel.]]

[[File:YGO-ARC-V-Ep-73-Img-0012.png|250px|thumb|Sylvio vows to win every Duel in the [[Underground Labor Facility|Underground]].]]Sylvio was taken to the Underground Labor Facility, where the staff that escorted him explained the rules of the place. Upon arriving to meet Gong and Chojiro and learning from [[Lucas Swank]] that one had to win consecutive Duels in order to leave, Sylvio immediately challenged the group to a Duel.<ref name="ep73">{{episode|Yu-Gi-Oh! ARC-V|73|ref}}</ref> However, there is no indication of any duels actually taking place.

[[File:Sawatari_and_Shun_91Sawatari and Shun 91.jpg|thumb|left|250px|Sylvio and [[Shay Obsidian|Shay]] against Underground guards.]]Despite his efforts, Sylvio was unable to leave the facility. He was doing cleanup work with Gong until and noticed [[Shay Obsidian|Shay]] starting a riot. [[Crow Hogan (ARC-V)|Crow]] came down arrived and explained that Duel Academy had invaded New Domino City. Sylvio, Gong, and Shay then got their [[Duel Disk]]s from Moon Shadow, who also informed them that Riley was Dueling alone to protect Celina. Sylvio and Shay decided to go and help while Gong stayed to protect Zuzu from Security. Their escape route was blocked off by an electric gate, forcing Sylvio and Shay to Duel against five guards, who were all defeated by Shay's "[[Raidraptor - Blaze Falcon (anime)|Raidraptor - Blaze Falcon]]". Lucas arrived on a mining cart to capture them but crashed into the gate. The Stomptroopers arrived and surrounded them but were stopped when Shinji activated the conveyer conveyor belt. Lucas returned to Duel them but was stopped by [[Officer 227]] and his fellow former officers, allowing Shay, Sylvio, and Moon Shadow to escape.<ref name="ep90">{{episode|Yu-Gi-Oh! ARC-V|90|ref}}</ref>

[[File:SylvioStopsSora.png|thumb|250px|Sylvio still considers Sora an enemy.]]

[[file:GongSylvioBlockCommons.png|thumb|250px|left|Sylvio and Gong block the rioting Commons' path.]]After watching the [[Commons (ARC-V)|Commons]] and Sector Security's battle escalate, Sylvio and Chojiro argue about how to get through. Before they come to a decision, Riley's traumatic memories again causes him to join the battle before being calmed by Shay. When they arrived at the Capital Building, the front entrance was blocked by Sector Security. Before they could come up with a plan, Declan arrived and destroyed their Trap Cards with "[[D/D/D Duo-Dawn King Kali Yuga (anime)|D/D/D Duo-Dawn King Kali Yuga]]"'s effect. After defeating Sector Security, they went get Yuya on Shay's "[[Raidraptor]]s", where they found Yuya, Gong, [[Sam (ARC-V)|Sam]], Frank, [[Amanda]] and Tarren on the bridge to the [[Duel Palace]] about to be attacked by Commons who had mistaken them for retreating Topsiders. Once he was in the stadium, Yuya challenged Jack to a Duel.<ref name="ep95">{{episode|Yu-Gi-Oh! ARC-V|95|ref}}</ref> Sylvio helped the Lancers and Chojiro in fending off Sector Security when they stormed the Duel Palace, defeating a [[Jutte Lord]] with "Abyss Actor - Superstar".<ref name="ep96">{{episode|Yu-Gi-Oh! ARC-V|96|ref}}</ref> He later went out with the Lancers to quell the Commons' riots. He and Gong block blocked off a mob of Commons from continuing their fight against Sector Security with "[[Superheavy Samurai Big Benkei (anime)|Big Benkei]]", "[[Superheavy Samurai Trumpeter (anime)|Trumpeter]]", "[[Abyss Actor - Funky Comedian (anime)|Abyss Actor - Funky Comedian]]", "[[Abyss Actor - Pretty Heroine (anime)|Abyss Actor - Pretty Heroine]]" and "[[Abyss Actor - Sassy Rookie (anime)|Abyss Actor - Sassy Rookie]]".<ref name="ep97">{{episode|Yu-Gi-Oh! ARC-V|97|ref}}</ref>

[[File:LancersLookOverHeartland.png|thumb|250px|Sylvio look over Heartland.]]

[[File:SylvioYuyaPose.png|thumb|left|250px|Sylvio accepting Kite's challenge.]]Sylvio accepted his challenge, and Gong joined as well in order to prove that they were not enemies. The Duelist, who Yuya identified as Kite Tenjo, concluded that they were invaders after seeing Sylvio use an Action Card. Sylvio tried to prevent Kite from [[Xyz Summon]]ing his dragon, but Kite managed to counter his attempts and call out "[[Galaxy-Eyes Cipher Dragon (anime)|Galaxy-Eyes Cipher Dragon]]", defeating Sylvio and Gong.<ref name="ep101">{{episode|Yu-Gi-Oh! ARC-V|101|ref}}</ref> Sylvio and Gong watched Yuya Duel Kite, who was able to counter some of Yuya's tactics from learning through the Duel with Sylvio. Kite learned that Action Cards can be used for defense, and Sylvio tried to explain how they could be used before being silenced. Yuya Xyz Summoned "[[Dark Rebellion Xyz Dragon (anime)|Dark Rebellion Xyz Dragon]]", [[Shay Obsidian|Shay]] and [[Allen KozukiAlan|two]] [[Saya Sasayama|other]] Resistance members interrupted the Duel and Shay clarified that Yuya, Sylvio and Gong were his comrades. While Kite was still in doubt, Shay assured Kite that Yuya wanted to stop Duel Academy as much as they did, asking him to trust Yuya like he did. Upon hearing Yuya's last name and the female Resistance member's plea to return, Kite refused before taking his leave of them.<ref name="ep102">{{episode|Yu-Gi-Oh! ARC-V|102|ref}}</ref>

[[File:AllenWithLancersAlanWithLancers.png|thumb|250px|Sylvio at the Resistance's new hideout.]]Sylvio went to the Resistance's [[Duel Sanctuary (ARC-V)|new hideout]] where he was scolded by Gong for being rude to AllenAlan. Upon witnessing Allen Alan mistaking Yuya for Yuto, he asked who Yuto was (as he had never learned his name when they Dueled). Gong explained to Sylvio that Yuto was someone [[Zuzu Boyle|Zuzu]] had met a few times who looked like Yuya. Sylvio learned of the second massive attack that Duel Academy had launched that had wiped out most of the Heartland civilians and the Resistance members. He, Yuya and Gong were surprised and shocked to hear of [[Yusho Sakaki]]'s visit to the dimension as well as the fact that Yusho was well-known in Heartland.<ref name="ep103">{{episode|Yu-Gi-Oh! ARC-V|103|ref}}</ref>

Shay later met up with Kite again, and as they prepared to Duel, Sylvio and Gong arrived to stop them, but were unable to do so. During the Duel, Sylvio explained Action Cards to Allen Alan and Saya. Yuya arrived, and also failed to stop the Duel, but Shay began to use Action Cards, calling them the power of his comrades, the Lancers. Sylvio and Gong explained the effects of each card he used, and they realized in shock that Shay's final card had been "[[Take Flight (Action Card)|Take Flight]]", which he couldn't use at the time.. They were surprised when Yuya revealed that Yuto was residing inside him. Kite defeated Shay and prepared to seal him in a card, but Saya begged him not to before revealing that she had witnessed [[Lulu Obsidian]]'s kidnapping. This revelation shocked Sylvio, and Kite reluctantly complied before leaving again.<ref name="ep105">{{episode|Yu-Gi-Oh! ARC-V|105|ref}}</ref>

[[File:Gong and Sylvio Find Allen Alan and SayakaSaya.png|thumb|250px|left|Sylvio and Gong find an injured Allen Alan and Saya.]]Saya later ran off to go find Kite, and Sylvio looked around the hideout for her, but he was unable to find her and returned to the hideout to inform Gong. Shay arrived and decided to split the Lancers into two groups to find Saya. While they were searching through Heartland, Gong and Sylvio heard an eplosion, and they found the unconscious bodies of Allen Alan and Saya at the source. Sylvio asked the [[Gloria Tyler|female]] [[Grace Tyler|Duelists]] that had defeated the two Resistance members if they were from Duel Academy. When the Duelists asked who he was, Sylvio revealed he and the others were Lancers, and he and Gong Dueled the Tyler sisters.<ref name="ep107">{{episode|Yu-Gi-Oh! ARC-V|107|ref}}</ref> Sylvio and Gong were defeated as well due to the handicap that the Tag Duel gave Gong, just as Yuya and Shay arrived. Sylvio remained unconscious for most of the Duel; waking when the Tyler sisters' [[LP]] was raised to 10,100, and wondering what Yuya could do. He was pleased when Yuya and Shay were able to defeat the Tyler sisters.<ref name="ep108">{{episode|Yu-Gi-Oh! ARC-V|108|ref}}</ref>

After Allen Alan accepted Yuya as a comrade, the [[Obelisk Force]] arrived to challenge them. Sylvio and Gong wanted to join the Duel, but their injuries. Sylvio was worried when Shay was taken out of the Duel by falling debris from the shockwave caused by the attack of "[[Chaos Ancient Gear Giant (anime)|Chaos Ancient Gear Giant]]".<ref name="ep109">{{episode|Yu-Gi-Oh! ARC-V|109|ref}}</ref> A squad led by Duel Academy Commander-in-chief [[Aster Phoenix (ARC-V)|Aster Phoenix]] surrounded them, but Kite, who had shown up to help Yuya and Shay, defeated the attackers, allowing everyone to escape while Yuya Dueled Aster.<ref name="ep110">{{episode|Yu-Gi-Oh! ARC-V|110|ref}}</ref>

[[File:Kaito and Lancers 112-1.png|thumb|250px|The [[Lancers]] and [[Kite Tenjo (ARC-V)|Kite]] going to the [[Fusion Dimension]].]]Sylvio and others made it back to the hideout with Shay and watched over him while the Resistance went back for Yuya. They learned that the Duel Academy forces in Heartland had decided to abandon the [[Arc Project]] and help rebuild the [[Xyz Dimension]] as a means of atonement. Sylvio agreed with Allen Alan when he expressed his concern over the decision to let Duel Academy help even if Yuya had opened their hearts. Yuto talked through Yuya, and Sylvio wondered if Yuya was talking, but Gong clarified that it was Yuto. He was surprised when Aster revealed that there was a way to restore the people who had been sealed into cards, but they would first have to retrieve the cards from Duel Academy in the Fusion Dimension. Sylvio, Yuya, Gong, and Kite bid goodbye to their allies and they traveled to the Fusion Dimension using the [[Interdimensional Travel Technology|Interdimensional Travel Device]] in Duel Academy's base.

Zuzu led Sylvio, Yuya and Gong to the harbor, where Yusho Sakaki was talking a boat to Duel Academy. Unfortunately, the ship left before they arrived, so they tried to find a boat to catch up with it. They were unable to find a boat, until Celina appeared and told them to follow her.<ref name="ep114">{{episode|Yu-Gi-Oh! ARC-V|114|ref}}</ref> Celina led them to a ship that Sylvio criticized for being a pirate ship, and he wondered if it could get them to Duel Academy, though he was intimidated by [[Captain Cutter]] and thought he was a real pirate. As they set sail on Captain Cutter's ship, more Duel Academy soldiers arrived by helicopter and Celina took Zuzu hostage. Cutter's crewmates tied Sylvio and Gong up and Sylvio cursed Celina for betraying them. He watched the Duel in worry as Cutter pressured Yuya with "[[Captain Lock]]" and knocked Yuya off the ship. Fortunately, [[Crow Hogan (ARC-V)|Crow]] [[Assault Blackwing - Raikiri the Rain Shower (anime)|saved]] Yuya, while Moon Shadow freed Sylvio and Gong and they escaped to the speedboat that the Lancers had brought. [[Sora Perse|Sora]] joined the Duel, and Sylvio tried to warn him about the effect of "Captain Lock", but Sora already knew to counter the effect by Fusion Summoning, as Gong explained to Sylvio (who claimed that he knew that). He watched Yuya and Sora defeat Cutter and learned that [[Shinji Weber|Shinji]] and [[Chojiro Tokumatsu|Chojiro]] had urged the Lancers to leave rebuilding [[New Domino City (ARC-V)|New Domino City]] to them.<ref name="ep115">{{episode|Yu-Gi-Oh! ARC-V|115|ref}}</ref> [[Declan Akaba|Declan]] later revealed to the Lancers that he travelled to Duel Academy three years previously and asked Yuya's father for help. Sylvio learned that Declan had discovered [[Revival Zero]], another part of the Professor's plan that involved Celina and [[Yuri]], a boy from the Fusion Dimension who resembled Yuya, and possibly Yuya himself. Declan advised the Lancers to believe in their friends' strength and fight to the very end. After they arrived at Duel Academy, Sylvio complained about having to climb a cliff, and Sora explained that it was closer to the Professor's lab. <ref name="ep117">{{episode|Yu-Gi-Oh! ARC-V|117|ref}}</ref>

The mysterious intruder defeated the two students and sealed them [[Emma (card)|into]] [[Jacob (card)|cards]], and Sylvio and Crow fled. Sylvio encouraged the Duelist to come out and face them, but Crow told Sylvio outright that he would be unable to defeat the Duelist and attacked Sylvio directly with "[[Assault Blackwing - Raikiri the Rain Shower (anime)|Assault Blackwing - Raikiri the Rain Shower]]", damaging his Duel Disk in the process. Sylvio quickly realized that Crow had done so on purpose in an attempt to protect him by removing him from the Duel. Crow's [[Blackwing - Last Will|attempt]] to defeat the Duelist failed, though it revealed him as the Battle Beast. Sylvio unsuccessfully attempted to stop Crow from being sealed into a [[Crow Hogan (ARC-V card)|card]], but he was able to recover the card before the Battle Beast could crush it and he tearfully lamented over Crow's demise. Yuya and Gong challenged the Battle Beast to a Duel, and Sylvio tried to join but his broken Duel Disk prevented him from doing so. He watched as the Battle Beast pushed Yuya and Gong to the brink of defeat and was surprised when Gong used an Action Card. He was also surprised when Gong lost and [[Jack Atlas (ARC-V)|Jack]] arrived in the arena.<ref name="ep120">{{episode|Yu-Gi-Oh! ARC-V|120|ref}}</ref> Sylvio helped Gong up and commented that Gong had held out because he knew Jack was coming, but Gong clarified that he hadn't known that would happen. Jack explained that he had been sent by Crow's kids and he asked where Crow was. Sylvio tearfully, revealed Crow's card explaining that Crow had tried to save him. Sylvio was amazed when Jack was able to deal heavy damage to the Battle Beast, and he wondered why it had been so high; Gong reminded him of the effect of "[[Pollice VersoThumbs Down]]". To his and Gong's surprise, [[Sanders]] revealed that the Professor had ordered him to eliminate Yuya. This caused Yuya to become lost in thought, and they called out to him as Sanders'attacked. Sylvio criticized Sanders' teachings when he told his students to follow the rules despite the fact that he had set five of them up to be sealed into cards. He told Yuya not to get lost now and take on Crow and Moon's enemy. Sylvio was surprised when the Battle Beast used the effect of Sanders' "[[Gladiator Beast Tamer Editor (anime)|Gladiator Beast Tamer Editor]]" to destroy itself in order to defeat Sanders.<ref name="ep121">{{episode|Yu-Gi-Oh! ARC-V|121|ref}}</ref>

[[File:Jack Helps Gong Up.png|thumb|left|250px|Sylvio and Jack help Gong to stand.]]

Sylvio and [[Gong Strong|Gong]] arrived in the [[City (Fusion Dimension)|City]] and found [[Sora Perse|Sora]] and [[Aster Phoenix (ARC-V)|Aster]] injured. As they checked on them, they learned that [[Yuya Sakaki|Yuya]], [[Yuto]], [[Yugo]] and [[Yuri]] had become [[Supreme King Z-ARC (character)|Supreme King Z-ARC]], and that Aster and Sora had attempted to regain Yuya's heart through Dueling. Sylvio watched over Sora and Aster while Gong ran to join the Duel and heard a [[Phoenix Whirlwind|engine roaring]], heralding the arrive of [[Jack Atlas (ARC-V)|Jack]]. To his shock, Zarc Z-ARC defeated his current opponents, [[Shay Obsidian|Shay]] and [[Kite Tenjo (ARC-V)|Kite]]. Sylvio told Gong and Jack that he was counting on them, lending them his perseverance.<ref name="ep137">{{episode|Yu-Gi-Oh! ARC-V|137|ref}}</ref>

[[File:Crow and Sawatari Join The Duel.png|thumb|250px|Sylvio and a revived Crow enter the Duel against ZarcZ-ARC.]]Despite this, Sylvio was furious that he was being left out of an important Duel, and he blamed [[Crow Hogan (ARC-V)|Crow]] for destroying his [[Duel Disk]]. He explained to Sora how Crow had saved him from the [[Battle Beast]], and that he was sure their thoughts would reach Yuya. [[ZarcZ-ARC]] brought out "[[Supreme King Dragon Clear Wing (anime)|Supreme King Dragon Clear Wing]]", angering Sylvio even further as he believed that he could reach Yugo with his Dueltaining if his Duel Disk worked. Zarc Z-ARC used the effect of "Clear Wing" [[Equip|equippedequip]] ped with "[[Supreme Presence]]" to destroy all of Gong's monsters, and Sylvio begged Crow to protect him. Gong and Jack survived through the effect of "[[Superheavy Samurai Warchief Heavystrong]]", and Sylvio was overjoyed and asked Crow if he saw how Gong protected "[[Scarlight Red Dragon Archfiend (anime)|Scarlight Red Dragon Archfiend]]". He was surprised when [[New Domino City (ARC-V)|New Domino City]] materialized in the Fusion Dimension, but he declared his belief that Jack could cross a materializing highway to reach Yuya. Gong was defeated, and the shockwave caused Sylvio to lose Crow's card. As Sylvio checked on Gong, Gong explained that that Zarc Z-ARC had reacted to the word Dueltaining. Gong gave Sylvio his Duel Disk and [[Yuya's pendant]], and to Sylvio's surprised joy, Crow arrived, freed from his card. Sylvio and Crow joined the Duel as Zarc Z-ARC defeated Jack, both receiving intrusion penalties. Sylvio put Yuya's pendant on and he announced that he would decide the Duel.<ref name="ep138">{{episode|Yu-Gi-Oh! ARC-V|138|ref}}</ref>

[[File:Crow and Sylvio in a roof-0.png|thumb|250px|left|Sylvio and Crow are defeated by ZarcZ-ARC.]]Sylvio told Zarc Z-ARC if carded person could rise, even Zarc Z-ARC won't able to revive and want to bring Yuya back. However, he got angry when Crow went before him and was surprised when Crow negated the effect of "[[Supreme King Gate Zero (anime)|Supreme King Gate Zero]]" and dealt damage to ZarcZ-ARC. He made fun of Zarc Z-ARC about in denial of losing and took his turn using Yuya's catchphrase in an attempt to remind what real [[Dueltainer|Dueltainment]] is. He [[Pendulum Summon]]ed "[[Abyss Actor - Superstar (anime)|Abyss Actor - Superstar]]", "[[Abyss Actor - Wild Hope (anime)|Wild Hope]]", and "[[Abyss Actor - Leading Lady (anime)|Leading Lady]]" while Zarc Z-ARC Summoned "[[Supreme King Dragon Odd-Eyes (anime)|Supreme King Dragon Odd-Eyes]]" during his turn due to its own effect. Sylvio told Yuya he did it properly and used the effect of "Superstar" to add "[[Abyss Script - Rise of the Abyss King (anime)|Abyss Script - Rise of the Abyss King]]" to his hand but Zarc Z-ARC used the effect of "[[Supreme King Z-ARC (anime)|Supreme King Z-ARC]]" to destroy it due to being added to his hand outside the [[Draw Phase]]. Sylvio told Zarc Z-ARC he was so scared and used "[[Abyss Script - Abysstainment (anime)|Abyss Script - Abysstainment]]" to [[Set]] "Rise of the Abyss King" by [[Tribute|Tributing]] "Leading Lady". He then activates it to destroy "ZarcZ-ARC" and "Odd-Eyes" equal to the number of "[[Abyss Actor]]" monsters he controls. When Zarc Z-ARC tried to use "[[Supreme Faceoff]]", Sylvio used the second effect of "Abyss Entertainment" to prevent him from activating it while he controls a [[Level 7 Monster Cards|Level 7]] "Abyss Actor" monster. But, Zarc Z-ARC used the effect of "Odd-Eyes" to protect [[Pendulum Monster]]s from being destroyed. Sylvio told Yuya the "Yuya Sakaki" he knew wasn't a coward to be so defensive and that he put braved danger to pull off a great escape. He asked Yuya where that courage come from and told him if he keeps forgetting, he'll keep reminding him. Sylvio used "Abyss Entertainment" again by Tributing "Wild Hope" and setting "Abyss King" again, which he activates to target "ZarcZ-ARC". However, "ZarcZ-ARC" was unaffected due to [[Fusion Monster|Fusion]], [[Synchro Monster|Synchro]], and [[Xyz Monster]]s being in the [[Graveyard|graveyard]] or [[Banish|banishedbanish]]ed, and cannot be destroyed. He was surprised to see [[Leo Akaba]] intruding the Duel and send his "[[Master Spirit Tech Force - Pendulum Ruler]]" to the Graveyard. Zarc Z-ARC defeated Leo before he could play any more cards, and then forced "Superstar" and Crow's "[[Assault Blackwing - Chidori the Rain Sprinkling (anime)|Assault Blackwing - Chidori the Rain Sprinkling]]" to attack "ZarcZ-ARC", doubling the damage with the effect of "Odd-Eyes" and defeating Sylvio and Crow as well. They fell from "Crossover", landing hard on the roof of a building, leaving only [[Declan Akaba|Declan]] facing ZarcZ-ARC.<ref name="ep139">{{episode|Yu-Gi-Oh! ARC-V|139|ref}}</ref>

He told Declan to pull Yuya's soul out of Zarc Z-ARC and threw Yuya's pendant to him. He and Crow were pleased when Declan was also able to damage ZarcZ-ARC. Sylvio was surprised when he thought "Z-ARC" had killed Declan, but relieved that [[Moon Shadow]] had returned and saved Declan. He was pleased when [[Ray Akaba|Ray]] [[Natural Energy Four Nature Cards|turned]] all of ZarcZ-ARC's monsters into [[Normal Monster]]s with their effects negated. When Yuya re-took control from Zarc Z-ARC and revived "Supreme King Z-ARC", Sylvio worried that Yuya wasn't fully in control.<ref name="ep140">{{episode|Yu-Gi-Oh! ARC-V|140|ref}}</ref>

Following ZarcZ-ARC's defeat and the rebirth of the [[Standard Dimension]] into the '''"Pendulum Dimension"''', Sylvio lost his memories of [[Zuzu Boyle|Zuzu]] and the [[Lancers]] adventures. He received a invitation from Declan for the [[Arc League Championship|Junior Arc League Championship]] and met Yuya and Gong at [[Leo Institute of Dueling]]. They learned from Declan that they would Duel in a [[Battle Royal]] first. Upon "[[Quartet of Quandry]]" [[Activate|activating]], Sylvio wondered where was the fourth Duelist and was surprised when Moon Shadow arrived. He then vowed to win the Duel, bringing out "[[Abyss Actor - Curtain Raiser (anime)|Abyss Actor - Curtain Raiser]]" and attacked "[[Performapal Hip Hippo (anime)|Performapal Hip Hippo]]" while using its effect to double its [[ATK]] during [[Damage calculation|damage calculation]]. However, Yuya [[Evasion|dodged]] the attack and Sylvio sets a card. When Moon Shadow reminded them of the Arc League Championship, Sylvio's memories started to return and watched Yuya take damage from the effect of "[[Twilight Ninja Shingetsu]]". When Moon Shadow used the [[Pendulum Effect]] of "[[Twilight Ninja Kagen (anime)|Twilight Ninja Kagen]]" to copy "[[Twilight Ninja Jogen (anime)|Twilight Ninja Jogen]]'s" effect, Sylvio noted Yuya would survive and was having a poor endgame.<ref name="ep141">{{episode|Yu-Gi-Oh! ARC-V|141|ref}}</ref> When Yuya used "[[Miracle]]" to protect himself, Sylvio used "[[Abyss Improv]]" to increase the [[Battle damage|battle damage]] by "Curtain Raiser's" ATK. However, Gong increased "[[Hippo Token]]'s" [[DEF]] with the effect of "[[Superheavy Samurai Helper (anime)|Superheavy Samurai Helper]]", causing Moon Shadow to receive the damage. When Yuya attacked "Curtain Raiser", Sylvio used its effect to double its ATK to lower the damage, but was still attacked directly by "Hip Hippo". He then Pendulum Summoned "Superstar" and "Curtain Raiser" from his [[Extra Deck]] and yelled out at Yuya to stop spacing out after he used "[[Performance Dragon's ShadowPerformance]]". He used the [[Pendulum Effect]] of "[[Abyss Actor - Funky Comedian (anime)|Abyss Actor - Funky Comedian]]" to increase "Superstar's" ATK by adding "Curtain Raiser" to his Extra Deck. He then used the effect of "Superstar" to search out and activate "[[Abyss Script - Shadow Spirit]]", attacking "Hip Hippo" and making its ATK equal to its DEF, but Yuya used "[[Encore]]" to copy the effect of "Evasion" from the Graveyard. Sylvio used "[[Abyss Entertainment]]" to allow "Superstar" to attack again, but Yuya used the second effect of "Dragon's Shadow Performance" to prevent "[[Odd-Eyes Pendulum Dragon (anime)|Odd-Eyes Pendulum Dragon]]" from being destroyed. When, [[Skip Boyle|Skip]] arrived at the stadium and told Yuya that Zuzu was gone, Sylvio regained his memories of her. To his shock, Gong gave up his [[LP]] to use the effect of "[[Superheavy Samurai Preparation]]" to weaken "Superstar" and defeated him with "Big Benkei".<ref name="ep142">{{episode|Yu-Gi-Oh! ARC-V|142|ref}}</ref>

To Sylvio's surprise, [[Henrietta Akaba|Henrietta]] revealed a baby Riley, and Sylvio wondered why Riley was a baby. He learned that the [[Natural Energy Four Nature Cards]] turned Riley back into a baby and lost his smile due to absorbing ZarcZ-ARC's soul to save Yuya. He also learned the reason for reenacting the Arc League Championship was to return Riley's smile and save the world through Yuya's Dueltaining. Sylvio doubted Riley's smile would save the world but was surprised when Yuya mentioned ZarcZ-ARC's soul being in some part of Riley. He also learned that Zarc Z-ARC will resurrect and the world will be at risk again if they don't do it. Sylvio was surprised when Gong summoned a [[Superheavy Samurai Steam Train King (anime)|new monster]] and rode it. He then ran out of the way before "Train King" could run over him.<ref name="ep143">{{episode|Yu-Gi-Oh! ARC-V|143|ref}}</ref>

He is later seen watching Yuya's Duel against Jack with Gong, [[Aura Sentia|Aura]] and the kids from [[You Show Duel School]]. Sylvio and Gong discussed how Jack countered Yuya's attack and summoned a [[Red Giant|new monster]].<ref name="ep146">{{episode|Yu-Gi-Oh! ARC-V|146|ref}}</ref> He celebrated Yuya's victory, but he was surprised when Declan and Yuya ended up Dueling. Sylvio wondered why Yuya didn't Pendulum Summon "[[Performapal Duck Dealer]]" but was pleased when Yuya did so. He was amazed when Yuya made a comeback against Declan's "[[D/D/D Doom King Armageddon (anime)]]s". Sylvio was surprised when Declan summoned "[[D/D/D Super Doom King Purple Armageddon (anime)|D/D/D Super Doom King Purple Armageddon]]", "[[D/D/D Super Doom King Bright Armageddon (anime)|D/D/D Super Doom King Bright Armageddon]]", and "[[D/D/D Super Doom King Dark Armageddon (anime)|D/D/D Super Doom King Dark Armageddon]]".<ref name="ep147">{{episode|Yu-Gi-Oh! ARC-V|147|ref}}</ref> He was worried when Yuya took huge damage from the four dragons being destroyed. Sylvio was amazed when Yuya used the effect of "[[Odd-Eyes Wing Dragon (anime)|Odd-Eyes Wing Dragon]]" to destroy all of Declan's monsters. He then wondered why Yuya attacked "Darkness Armageddon" due to its ATK being higher than "Wing Dragon". Sylvio cheered Yuya on when he used the effects of "[[Odd-Eyes Xyz GateXyzgate]]" and "[[Wonder Chance]]" to give "[[Odd-Eyes Rebellion Dragon (anime)|Odd-Eyes Rebellion Dragon]]" additional attacks. However, he was surprised when Declan survived the attacks and happy when Yuya was able to Pendulum Summon again. When Yuya and Declan were collecting [[Action Card]]s due to the effect of "[[Performapal Five-Rainbow Magician (anime)|Performapal Five-Rainbow Magician]]", Sylvio and Gong were surprised at how Declan was stealing Yuya's shine. They were also worried when Declan was catching up to Yuya and Sylvio was pleased that Yuya was able to get five first. He was pleased when Yuya won and was transported to the field by Ray to witness Zuzu's revival.<ref name="ep148">{{episode|Yu-Gi-Oh! ARC-V|148|ref}}</ref>

When [[Crow Hogan (ARC-V)|Crow]] and his gang saved Sylvio and the other [[Lancers]] from [[Security]], Sylvio showed sincere respect and gratitude to Crow. While Crow found Sylvio's claims about the Lancers and [[Standard Dimension]] strange, he didn't seem to dislike Sylvio. After Sylvio defended Crow from a large Security guard which allowed Crow and his friends to escape, they seem to have gained respect for each other, giving each other a thumbs up.

Despite being initially angry that Crow had sacrificed himself to save him, when Crow was sealed into a [[Crow Hogan (ARC-V card)|card]] by [[Battle Beast]] Sylvio grew extremely upset and immediately ran to save his card when Battle Beast was about to step on it, showing how much he cares for and respects Crow. Due to Crow's actions Sylvio came to recognize the importance of others sacrificing themselves for those they care about, and behaved more emotionally than usual. He was horrified when he lost the card, but overjoyed when Crow was freed from the card and returned to Duel Zarc Z-ARC with him.

Sylvio's Deck has changed drastically over the course of the anime. He has , having used four completely different Decks, but according to [[Katsumi Ono]], he will use an "[[Abyss Actor]]" Deck for the rest of the series.<ref>{{citeweb|url=https://stardustjunction.wordpress.com/2015/03/13/anime-news-interview-with-director-ono-easter-eggs-etc/|title=Anime News: Interview with Director Ono, Easter Eggs etc}}</ref>

Sylvio initially plays a '''"[[Dart]]" Deck'''. All the cards in this Deck (besides the "Magicians" he stole from [[Yuya Sakaki|Yuya]]) are [[Parallel Rare]]. His strategies focus on his "Dart Striker" monsters powering one another up through their effects, which receives a strong boost from his use of [[Pendulum Summon]]ing during his Duel with Yuya.

{{Decklist|Darts Dart Deck|effect monsters =

|pendulum monsters =

|spells =

|traps =

Sylvio later plays a '''[[WATER]] [[Monarch (series)|Monarch]] Deck''', which focuses on [[destroy|destroying]] ing [[Spell Card|Spell]]/[[Trap Card|Trap]] Cards and [[Summon]]ing "[[Mobius the Mega Monarch (anime)|Mobius the Mega Monarch]]". Like his "Dart" Deck, the cards in this Deck are Parallel Rare.

|effect monsters =

|spells =

|traps =

Sylvio uses a '''"[[Yosenju]]" Deck''' during the [[Arc League Championship]]that includes [[Pendulum Monster]]s. Sylvio focuses a lot of his strategies on swarming the field with his "Yosenju" monsters to accumulate counters on his "[[Yosen Training Grounds (anime)|Yosen Training Grounds]]" which he uses to gather the necessary cards for his strategies. He also uses a lockdown comprised of "[[Mayosenju Daibak (anime)|Mayosenju Daibak]]", "[[Yosen Whirlwind (anime)|Yosen Whirlwind]]" and "[[Dizzying Winds of Yosen Village (anime)|Dizzying Winds of Yosen Village]]", returning his opponent's cards to their Deck, putting them in a pinchand bypassing the ability of Pendulum Monsters to revive themselves. This Deck, unlike his previous two, is not comprised of Parallel Rare cards.

|effect monsters =

|pendulum monsters =

|spells =

|traps =

Sylvio's final Deck is an '''"[[Abyss Actor]]" Deck''', first used during the invasion of the [[Obelisk Force|Fusion Dimension Warriors]]. It focuses on [[Pendulum Summon]]s ing and is supported by the "[[Abyss Script]]" [[archetype]] of [[Spell Card]]s. During the Heartland City arcthird season, he also demonstrates a focus on restricting the opponent's [[Extra Deck]]. Like his previous "Yosenju" Deck, it is not composed of Parallel Rare cards. While Sylvio is never shown using any other Summoning methods with this Deck, he is shown to have a substantially sized-Extra Deck during his Duel with Yugo, implying he has access to others.

|pendulum monsters =

|spells =

* [[Abyss Script - Shadow SpiritFire Dragon's Lair (anime)|Abyss Script - Fire Dragon's Lair]]

|traps =

|normal monsters =

|effect monsters =

|ritual monsters =

|spells =

|traps =

| 3 [[Obelisk Force]] members || [[Yu-Gi-Oh! ARC-V - Episode 048|48]]-[[Yu-Gi-Oh! ARC-V - Episode 049|49]] || Win (with [[Celina]], [[Gong Strong]], [[Moon Shadow]] and [[Shay Obsidian]])

| [[Sector Security (ARC-V)|Sector Security]] officer || [[Yu-Gi-Oh! ARC-V - Episode 056|56]] || Lose

| 3 [[Stomptroopers]] || [[Yu-Gi-Oh! ARC-V - Episode 063|63]] || Win (with [[Yuya Sakaki]], [[Gong Strong]] and [[Shay Obsidian]])

| 5 [[Underground Labor Facility|Underground Facility]] Guards || [[Yu-Gi-Oh! ARC-V - Episode 090|90]] || Win (with [[Shay Obsidian]])

| 5 [[Duel Chasers]] || [[Yu-Gi-Oh! ARC-V - Episode 096|96]] || Win (with [[Declan Akaba]], [[Gong Strong]], [[Shay Obsidian]], [[Riley Akaba]] and [[Chojiro Tokumatsu]])

| 3 [[Duel Academy (ARC-V)|Duel Academy]] Duelists || [[Yu-Gi-Oh! ARC-V - Episode 100|100]] || Win (with [[Gong Strong]] and [[Yuya Sakaki]])

|[[Battle Beast]]||[[Yu-Gi-Oh! ARC-V - Episode 120|120]]||No result; Lose ([[Crow Hogan (ARC-V)|Crow Hogan]])

| [[ZarcZ-ARC]]/[[Yuya Sakaki]] || [[Yu-Gi-Oh! ARC-V - Episode 139|139]] || Lose (with [[Crow Hogan (ARC-V)|Crow Hogan]])

| [[Yuya Sakaki]], [[Gong Strong]], and [[Moon Shadow]] || [[Yu-Gi-Oh! ARC-V - Episode 141|141]]-[[Yu-Gi-Oh! ARC-V - Episode 143142|142]] || Win (Moon), Lose(Gong and Yuya)