| ko_name = 루마| ko_rr_name = Luma| ko_trans_name = Ruma

| ja_voice = [[{{voice actors|ja|Yamato Kinjo]]}}| en_voice = [[{{voice actors|en|Matt Shipman]]}}<ref name="tweet1">https://twitter.com/MattShipmanVO/status/578995356836474881</ref>

'''Shay Obsidian''', known as '''Syun Kurosaki'''<ref name="TVTokyo">{{citeweb|url=http://www.tv-tokyo.co.jp/anime/yugioh-arcv/chara/index_4index_2.html|title=TV Tokyo Yu-Gi-Oh! ARC-V Characters|date=April 5, 2015}}</ref><ref name="ep59">{{episode|Yu-Gi-Oh! ARC-V|59|ref}}</ref><ref name="ep70">{{episode|Yu-Gi-Oh! ARC-V|70|ref}}</ref> ({{Ruby|黒|くろ}}{{Ruby|咲|さき}} {{Ruby|隼|しゅん}} , ''Kurosaki Shun'') in the Japanese version, is one of the characters in the ''[[Yu-Gi-Oh! ARC-V]]'' anime. He is a Duelist from the [[Xyz Dimension]] who is one of [[Yuto]]'s comrades and serially attacked the [[Leo Institute of Dueling]] with the intention of rescuing his younger sister [[Lulu Obsidian]]. Upon having After realizing he had similar goals to [[Declan Akaba|Declan]] and learning of his true target, the two agreed to cooperate, and he subsequently became one of the first [[Lancers]].

{{Double image| left<!-- -->|FullShayObsidian.png|170<!-- -->|Shun_PreShun Pre-Invasion_145Invasion 145.png|105<!-- -->|Full body views of Shay in his post- and pre-invasion outfits.}}Shay is a tall young man with straight blueish-black hair that falls to his chin, and light green bangs in the shape of a wing partially tucked under some strands on the left. He has yellow-green eyes, and similar to [[Yuto]], used to keep his face concealed behind dark glasses and a red scarfsignifying his allegiance to the Resistance. He wears a blue trenchcoat that is tattered at the ends; the coat is belted shut, and is adorned with belted cuffs. He also sports grey pants and brown shoes.

Shay tends to converse about his experiences when the comments of other people allude to them (whether such allusions are intentional or not). While Dueling, he demonstrates a more violent side when he uses "[[Raidraptor - Rise Falcon (anime)|Raidraptor - Rise Falcon]]". Aside from these moments, he says little when he doesn't have to talk, not even bothering to learn the names of many of his opponents; he simply challenges them to a Duel. However, he often employs the word "revolution" and similar terms, reinforcing his strong belief of Dueling solely to defeat his enemies and protect his comrades. Despite his determination to protect his comrades, he initially prefers acting alone and dislikes it when others try to protect him by risking themselves but he drops this attitude after his duel against Crow where he is completely fine in helping his new comrades and often comes to aid the [[Lancers]]. However, the memories of the attack on his homeland have clearly scarred him, and when he was in the "[[Neo Heartland City]]" Action Field for a second time, he was initially unwilling to discuss the events, but on later prompting by [[Celina]], he admitted that the faces and laughter of [[Duel Academy (ARC-V)|Duel Academy]] students that had attacked [[Heartland City (ARC-V)|Heartland]] would always remain in his mind. Shay has confirmed that he sees life as a battlefield and everyone else an enemy due to the loss of everything as a result of the attack on Heartland. This is especially shown during and after [[Yu-Gi-Oh! ARC-V - Episode 074|his Duel with Dennis]] during the Friendship Cup, where he pushed his opponent to reveal his true nature. In the dub, Shay even claims to Celina that it hurts to look at her due to her resemblance to Lulu.

Like [[Yuto]], Shay's [[Duel Disk]] possesses the ability to materialize the [[card effect|effects]] of ''[[Duel Monsters]]'' cards. The Disk also has the power to seal a person inside a card, though unlike previous uses of this power in the franchise, the entire person, and not just their soul. His Duel Disk is later upgraded with the function to produce an Action Field, and also appears to have dimensional travel technology incorporated into it. However, [[Declan Akaba|Declan]] modified it so that he could not seal a person anymore, and also seemed to have reduced its ability to materialize the effects of a Duel.<ref name="ep75">{{episode|Yu-Gi-Oh! ARC-V|75|ref}}</ref>. Shay is highly acrobatic and athletic, as seen when he jumped off of the sides of several buildings and rolled along the ground to break his fall during his first Duel with [[Sora Perse]]. He is also a highly skilled fighter, strong enough to defeat several guards each with a single blow while escaping from the [[Facility (ARC-V)|Facility]] in the [[Synchro Dimension]].

His name in the dub name, "Shay", is Gaelic for "hawk". His name could also refer to [[wikipedia:Shays' Rebellion|Shays' Rebellion]], a famous historical uprising, given the fact that rebellion is a key aspect of his character. His dub surname, "Obsidian", is a glassy black volcanic material; an appropriate name for one having gone through the stress that Shay has. His Japanese name, Syun「{{Ruby|隼|しゅん}}」, means "falcon", alluding to his [[Xyz Monster]]s, while his last name can translate to "black blossom". Both of his last names are likely a reference to the black borders of Xyz Monsters.

Shay's homeland, [[Heartland City (ARC-V)|Heartland City]] in the [[Xyz Dimension]], was once a place where [[Duelist]]s were loved and everyone enjoyed Dueling. Shay attended the [[Spade Branch]] of [[Heartland Duel School]]<ref name="ep101" /> known for training professional Duelists.<ref name="ep75">{{episode|Yu-Gi-Oh! ARC-V|75|ref}}</ref> Shay was a rival to [[Kite Tenjo (ARC-V)|Kite Tenjo]], the ace of the [[Clover Branch]].<ref name="ep101" /><ref name="kitetvtokyoprofile">{{citeweb|url=http://www.tv-tokyo.co.jp/anime/yugioh-arcv/chara/index_2.html|title=Yu-Gi-Oh! ARC-V characters|publisher=TVTokyo.com}}</ref><ref name="ep101" /> Whenever the two Dueled, they drew large crowds of children who looked up to them.<ref name="ep105">{{episode|Yu-Gi-Oh! ARC-V|105|ref}}</ref> Shay and Yuto watched Lulu's Duel as the latter commented on her great Dueling skills. Shay told Yuto that she was his sister and after her Duel, he introduced them both to each other.<ref name="ep124">{{episode|Yu-Gi-Oh! ARC-V|124|ref}}</ref> At one point Shay, [[Yuto]], and [[Lulu Obsidian|Lulu]] watched a Duel of Kite's from the audience at an arena.<ref name="ep101" /> Shay witnessed Lulu lose to [[Sayaka Saya Sasayama]], and was furious both that she lost and that she accepted a card from Sayaka Saya due to his opinion on such matters and he slapped the card from her hands.<ref name="ep119" />

[[File:ArcV 018.png|thumb|left|Shay Dueling [[HerkHerc]].]]He later Dueled [[HerkHerc]], another LID employee, and was witnessed by [[Yuto]] after the latter was warped there by [[Zuzu's bracelet]]. Shay defeated Herk Herc with his [[Raidraptor - Rise Falcon (anime)|ace monster]] and sealed him inside [[Herk Herc (card)|a card]] as he had with Marco and sent both cards to LID. He later unwittingly saved [[Yuya Sakaki]] from three LID elites and [[Curio Sawatari]], who were pursuing Yuya under the latter's orders. Yuya asked Shay on what was going on, but he gave no response. Shay [[Xyz Summon]]ed again and defeated the three elites with his ace monster, sealing them in cards and damaging the nearby overpass. Yuya was knocked out in the process, while Curio was scared off.<ref name="ep18" />

Lucas ended up pitting Shay against Dennis in a Turbo Duel after the two directed mild barbs at one another. Since it was his tenth game in his winning streak, Shay was handicapped with a 1000 [[LP]] start, but he swiftly inflicted damage to Dennis. Dennis was able to prevent game ending damage and Shay did the same, using "[[Rank-Up-Magic Raid Force (anime)|Rank-Up-Magic Raid Force]]" to call out "[[Raidraptor - Blaze Falcon (anime)|Blaze Falcon]]" and nearly defeat Dennis. He was surprised at the intensity of Dennis's Dueling, given that Dennis was an LID student and grew suspicious. Dennis responded that he was indeed from LID and performed a Pendulum Summon on his next turn.<ref name="ep58" /> Dennis performed a Pendulum-Xyz Summon to bring out "[[Performage Shadow Maker]]" and destroy "Blaze Falcon", but Shay avoided damage and brought out "[[Raidraptor - Revolution Falcon (anime)|Revolution Falcon]]" using "Revolution Force". Despite this, Dennis was able to Summon another "Shadow Maker" using the effect of the first one. Before the Duel could end, however, their [[Duel Runner]]s were deactivated and they were sent tumbling, and were then arrested by [[Sector Security (ARC-V)|Sector Security]].<ref name="ep59">{{episode|Yu-Gi-Oh! ARC-V|59|ref}}</ref>

Upon arriving at the [[Facility (ARC-V)|Facility]], Shay got into a fight with ten other prisoners and was sent to solitary confinement as a result.<ref name="ep60">{{episode|Yu-Gi-Oh! ARC-V|60|ref}}</ref> He heard the cheering during Yuya's Duel with the prisoner "boss", [[Chojiro Tokumatsu]].<ref name="ep61">{{episode|Yu-Gi-Oh! ARC-V|61|ref}}</ref> Later, Shay resolved to break out of the Facility by himself. He climbed to the ceiling of the cell to trick the guards into coming in to look for him. As soon as they did, Shay broke out into the hallways and knocked the guards out with ease. He ran into Gong, who was part of a larger-scale breakout and had come to break Shay out himself. Shay claimed that he didn't need Gong, but he led him to a storage room to reclaim theirs and Dennis' Duel Disks, refusing to leave while unarmed.<ref name="ep62">{{episode|Yu-Gi-Oh! ARC-V|62|ref}}</ref> He intervened when Gong failed to save Yuya, Sylvio, and Chojiro from the [[Stomptroopers]]. He took advantage of the lack of [[Level]] of "Rise Falcon" to bypass the effect of the troopers' "[[Goyo King (anime)|Goyo King]]" and defeat them. They regrouped with the rest of the escaped Lancers in addition to fellow escapees [[Crow Hogan (ARC-V)|Crow]], [[Shinji Weber|Shinji]], and [[Damon Lopez|Damon]], but when they attempted to swim from the Facility, they were arrested personally by Sector Security Director [[Jean-Michel Roget]]. Envoys of the [[High Council]] intervened on their behalf, and the Lancers were inducted into the Friendship Cup, with Shay set up to Duel against Dennis on the second day of the tournament in the first round.<ref name="ep63ep70">{{episode|Yu-Gi-Oh! ARC-V|63|ref}}</ref><ref name="ep70ep63">{{episode|Yu-Gi-Oh! ARC-V|7063|ref}}</ref>

After learning about Lulu's kidnapping from Dennis, Shay became more enraged and Summoned his strongest monster, "[[Raidraptor - Satellite Cannon Falcon (anime)|Raidraptor - Satellite Cannon Falcon]]". He used it to defeat Dennis mercilessly, leaving him injured. After the Duel, Shay angrily approached Dennis and attempted to seal him into a card but he realized he couldn't do that, speculating that Declan removed that function from his Duel Disk. Shay attempted to punch Dennis instead, but he was quickly restrained and taken away by the stadium's security.<ref name="ep75">{{episode|Yu-Gi-Oh! ARC-V|75|ref}}</ref>

Shay succeeded in resolving Crow and Shinji's issues, as they both left Shay and got on their Duel Runners to show their support for Yuya's Duel against Jack. Shay watched the remainder of the Duel and smiled when Yuya won. Shay also watched Sora's broadcast and was shocked to learn that [[Jean-Michel Roget]] defeated Sora and Moon Shadow. He quickly left before the broadcast ended, heading towards Sector Security Headquarters to join the efforts in rescuing Zuzu from Roget.<ref name="ep98">{{episode|Yu-Gi-Oh! ARC-V|98|ref}}</ref> He broke into the building with "Rise Falcon" and found Gong and Sylvio at the control room where Sora had sent his message. Shay commented that Sora was likely still alive. After Yuya rescued Zuzu, Shay was the first to notice that Roget was still alive. Roget activated the Interdimensional Transportation Machine, which teleported himself and Zuzu to an unknown dimension. When Gong tried to prevent Yuya from being sucked into the wormhole too, Shay came to his aid and Sylvio to his, but they were all sucked into the wormhole and ended up in the ruins of a city. Shay informed the others that this was [[Heartland City (ARC-V)|Heartland City]] in the [[Xyz Dimension]].<ref name="ep99">{{episode|Yu-Gi-Oh! ARC-V|99|ref}}</ref>

After informing the Lancers where they were, Shay separated from them to check on the Resistance base, but he found it abandoned and concluded that this comrades had been wiped out in his absence. He left the building and lamented that he'd thought that allying with Declan would be a shortcut to Lulu, remembering both when he'd first found out about Declan and their first meeting.<ref name="ep100">{{episode|Yu-Gi-Oh! ARC-V|100|ref}}</ref>

[[File:ShayArrivesWithComrades.png|thumb|Shay arriving with Allen Alan and SayakaSaya.]]While Yuya and [[Kite Tenjo (ARC-V)|Kite]] were Dueling and Kite mistook Yuya for Yuto, Shay, [[Allen Kozuki|AllenAlan]], and [[Sayaka Saya Sasayama|SayakaSaya]] arrived and cleared up the misunderstanding. He revealed that Yuya, Sylvio and Gong were his comrades but Kite still doubted him. Shay assured Kite that Yuya wanted to stop Duel Academy as much as they did, asking him to trust Yuya like he did. However Kite refused before disappearing in a flash of light after hearing Yuya's last name.<ref name="ep102">{{episode|Yu-Gi-Oh! ARC-V|102|ref}}</ref>

At the Resistance's [[Duel Sanctuary (ARC-V)|new hideout]], Shay revealed that they were able to find Yuya and the others because the refugees that they had saved before told their location and gave them their gratitude. Allen Alan then suspected that Yuya was in fact Yuto himself due to their great resemblance and even using "[[Dark Rebellion Xyz Dragon (anime)|Dark Rebellion Xyz Dragon]]", but Shay cleared the confusion, explaining that despite their resemblance Yuya is not Yuto and the latter had suddenly vanished. He furthered explained that he originally thought Yuya had stolen "Dark Rebellion" from Yuto, however, after watching Yuya throughout their battle at [[Synchro Dimension]], he dismissed his suspicion as he now understood why Yuto entrusted "Dark Rebellion" to Yuya. Allen Alan then explained that while they were gone, Duel Academy had launched a massive offensive attack that almost completely destroyed both [[Spade Branch|Spade]] and [[Clover Branch|Clover branch]]s' Resistance Duelists, including Kite's family. Shay blamed himself for this, thinking that if he and Yuto were there, they might be able to do something to change the situation.<ref name="ep103" />

Shay appeared to Kite after the latter shrugged off Allen Alan and SayakaSaya's attempt to bring him back. He grabbed Kite's shoulder, prompting Kite to lunge away and threaten to turn Shay into a card as well. Shay told him to go ahead and try and the two started a Duel. Shay Summoned "[[Raidraptor - Rise Falcon (anime)|Raidraptor - Rise Falcon]]" on his first turn, a move Kite called a disgraceful misplay, as that monster's effect requires the opponent to control a [[Special Summon]]ed monster to be used. Shay was able to counter the effect of Kite's "[[Galaxy-Eyes Cipher Dragon (anime)|Galaxy-Eyes Cipher Dragon]]" with "[[Raptor's Intercept Formation]]" and mitigate some of the impact of that attack with an [[Action Card]], "[[Miracle]]". Kite claimed Shay was a coward. Shay brought out "[[Raidraptor - Blaze Falcon (anime)|Raidraptor - Blaze Falcon]]" and destroyed "Cipher Dragon", but Kite used "[[Cipher Spectrum (anime)|Cipher Spectrum]]" to revive it and Special Summon a second one. Yuya arrived and asked them to stop the fight, as they were comrades. Kite claimed that "Cipher Dragon" was a part of him and that he no longer needed comrades. Shay used a string of Action Cards in an attempt to take down "Cipher Dragon" but failed and brought out "[[Raidraptor - Ultimate Falcon (anime)|Raidraptor - Ultimate Falcon]]". Kite chided him for claiming the Action Cards represented his new comrades and that the move failing must mean his comrades will fail too. When Yuya began talking about Kite and Shay's past and revealed that Yuto resided inside of him, Shay claimed he had had a hunch about that. Though "Ultimate Falcon" nearly won Shay the Duel, "[[Cipher Mirror Knight]]" and "[[Cipher Clone Magic]]" enabled Kite to come back and defeat it and Shay. Kite moved to turn Shay into a card after the Duel, but stopped to reconsider after Sayaka Saya pleaded with him. Having already lost [[Lulu Obsidian|Lulu]], Sayaka Saya said she couldn't bear to lose Shay as well. Kite still seemed to be consider turning him into a card, but reluctantly stopped and proceeded to walk away.<ref name="ep105" />

Shay returned to the hideout and decided to split the Lancers into two groups to find SayakaSaya. He told Gong and Sylvio not to slack off.<ref name="ep107">{{episode|Yu-Gi-Oh! ARC-V|107|ref}}</ref> While searching, Shay and Yuya heard Sylvio's scream and ran to his location. They arrived and found Sylvio, Gong, AllenAlan, and Sayaka Saya on the ground. Shay was surprised when Gong whispered, "[[Amazoness]]". He then asked the [[Gloria Tyler|female]] [[Grace Tyler|Duelists]] if were they the ones who used "Amazoness" [[Main Deck|Decks]]. The sisters thought Shay was a Resistance member who fled, and Shay was about to respond until Yuto cut in via Yuya. Shay asked Yuya to let Yuto do what he wanted because Yuto must be feeling the same way as Shay was. Yuya agreed under the condition that he could Duel his own way; Shay replied that Yuya could do what he wanted, as Shay would Duel his own way. They Dueled the Tyler Sisters in a [[Tag-Team Duel]] and learned that the Professor had sent the Tyler sisters after them; Shay noted defeating them would thus be all the sweeter. On Shay's turn, Shay told the Tyler sisters that he would show them how the Resistance retaliated when cornered. He Pendulum-Xyz Summoned "Raidraptor - Rise Falcon" and attacked both "[[Amazoness Pet Liger (anime)|Amazoness Pet Liger]]" and "[[Amazoness Empress (anime)|Amazoness Empress]]", but was unable to destroy them due to their effects and furiously watched as the Tyler sisters regained their lost LP with "[[Amazoness Hot Spring (anime)|Amazoness Hot Spring]]". Shay was able to use "[[Rank-Up-Magic Escape Force]]" and "[[Raidraptor - Iron Heart]]" to dodge the attack by Ranking-Up "Rise Falcon" into "Blaze Falcon" and then reviving "Rise Falcon". Grace told Shay to give up, Shay told them that the Resistance didsndidn't know those words and he vowed that he would never give up. Yuya asked Shay and Yuto to let him answer their feelings, and Shay eventually agreed. Shay heard Yuya telling Yuto that he would borrow their strength and helped him by using the effect of "Rise Falcon". He then smiled as he and Yuya won the Duel.<ref name="ep108">{{episode|Yu-Gi-Oh! ARC-V|108|ref}}</ref>

[[File:SayakaSaya, Shay, and KaitoKite.png|thumb|An unconscious Shay being carried by [[Kite Tenjo (ARC-V)|Kite]].]]After the Duel, Shay told Allen Alan to be himself when he accepted Yuya as a comrade before the Obelisk Force arrived. He and Yuya decided to Duel them since the others were injured. Shay told Yuya that his Dueltaining wouldn't work on them, but he would still Duel his own way. Shay brought out "Rise Falcon", but it was destroyed by the effect of "[[Double Ancient Gear Hunting Hound]]". Shay used "[[Rank-Up-Magic Raptor's Force (anime)|Rank-Up-Magic Raptor's Force]] to summon "Blaze Falcon" and gain advantage. When Yuya was targeted by the effect of "[[Ancient Gear Hunting Hound (later anime)|Ancient Gear Hunting Hound]]", Shay activated "[[Raidraptor - Silent Roar]]" to negate it. After the Obelisk Force brought out "[[Chaos Ancient Gear Giant (anime)|Chaos Ancient Gear Giant]]", Shay ran to save Sayaka Saya from the falling debris caused by the shockwaves created by "Chaos Giant". He was able save Sayaka Saya but he was badly injured by the debris and he collapsed from his wounds.<ref name="ep109">{{episode|Yu-Gi-Oh! ARC-V|109|ref}}</ref> After Kite defeated the squad [[Aster Phoenix (ARC-V)|Aster Phoenix]] bought with him, he carried Shay on his back and escaped with the others, while Yuya Dueled Aster.<ref name="ep110">{{episode|Yu-Gi-Oh! ARC-V|110|ref}}</ref>

[[File:Shay_Place_in_a_Recover_PodShay Place in a Recover Pod.png|thumb|left|Shay placed in a recovery pod.]]Shay was safely taken back to the Resistance hideout and resting there with SayakaSaya, Sylvio, and Gong watching over him. The Duel Academy in Heartland decided to abandon the [[Aquaria Arc Project]] and help rebuild the [[Xyz Dimension]] to atone for what they have done. Shay was relocated to Duel Academy's base in Heartland for more proper medication under Aster's suggestion, being placed in a healing capsule until he recovered. Kite then took his place to rescue Lulu.<ref name="ep112">{{episode|Yu-Gi-Oh! ARC-V|112|ref}}</ref>

Shay recovered from his injuries and he and Aster traveled to Duel Academy. He arrived in time to see Kite falling off of the Western tower, and sent "Rise Falcon" to save him. He told Kite how Aster helped him and decided to come when finding out that the Lancers were going to Duel Academy. He learned from Kite that Lulu pushed him off the tower and ran up the tower to see her.<ref name="ep117">{{episode|Yu-Gi-Oh! ARC-V|117|ref}}</ref> He made it to the top of the tower and saw Lulu. They hugged each other after being reunited until Kite arrived. Shay and Kite argued about Lulu's sanity until she tried to attack Shay. Upon seeing this, Shay refused to forgive Duel Academy and accepted her challenge. Before the Duel, Kite gave Shay SayakaSaya's "[[Little Fairy (later anime)|Little Fairy]]". Shay Xyz Summoned "Rise Falcon" on the first turn, and upon seeing Lulu Summon "[[Lyrical Luscinia Lyrilusc - Assembly Assembled Nightingale (anime)|Lyrical Luscinia Lyrilusc - Assembly Assembled Nightingale]]", Shay was positive that it was Lulu, but she had fallen fAlan into the darkness. Shay told Lulu that he would bring Lulu back to her true self and he brought out "Blaze Falcon" to reduce the Overlay Units of "Assembly Assembled Nightingale". Lulu attacked Shay again on her next turn, and Shay commented that it was sweet that Lulu was still using the same Deck despite being under Duel Academy's control and he claimed that she couldn't defeat him due to being familiar with it. However, Lulu Summoned a new monster, "[[Fusion Parasite (anime)|Fusion Parasite]]", and used it to [[Fusion Summon]] "[[Lyrical Luscinia Lyrilusc - Independent Nightingale (anime)|Lyrical Luscinia Lyrilusc - Independent Nightingale]]", much to Shay's shock. He deduced that "Fusion Parasite" was controlling Lulu since she would never use Fusion and fended off Lulu's efforts to defeat him. Shay asked if Lulu remembered her Duel with Sayaka Saya in the Clover Branch tournament. He told her how he didn't understand SayakaSaya's behavior, even after losing Lulu. But after meeting Yuya and the Lancers, he understood and he Summoned "Little Fairy" and used its effect twice to increase its Level to 5 before combining it with "Blaze Falcon" via "[[Cross Xyz]]" to [[Cross Xyz Summon]] "[[Raidraptor - Étranger Stranger Falcon (anime)|Raidraptor - Étranger Stranger Falcon]]". He told Lulu that SayakaSaya, Kite, and all of their comrades were waiting for her return, but she claimed that she didn't care. He activated the effect of "Étranger Stranger Falcon" to destroy "Independent Nightingale" and inflict damage equal to its ATK. Lulu regained control of her body and told Shay to attack her. "Étranger Stranger Falcon" did so, winning Shay the Duel, and Shay ran to check on Lulu.<ref name="ep119" />

As Shay made it to the bottom of the tower with Lulu on his back, he collapsed. He held his shoulder while Lulu ran off to go find Kite for help.<ref name="ep122">{{episode|Yu-Gi-Oh! ARC-V|122|ref}}</ref> When Yuya and Yuto vowed to regain Lulu's sanity by destroying "Independent Nightingale", Shay told them it was useless. He told Yuya how he already Dueled Lulu and destroyed "Fusion Parasite" but the result ended the same and they probably have to defeat [[The Doktor|the person]] controlling her. He was surprised to see Yuya using Yuto's Deck and was happy when he Xyz Summoned "[[The Phantom Knights of Cursed Javelin (anime)|The Phantom Knights of Cursed Javelin]]". Shay then told Yuya that he was leaving Lulu to him while he looked for the person controlling her but was tased by Celina.<ref name="ep124">{{episode|Yu-Gi-Oh! ARC-V|124|ref}}</ref> Shay muttered Lulu's name and told Yuya to go after her and Celina, passing out in the process.<ref name="ep125">{{episode|Yu-Gi-Oh! ARC-V|125|ref}}</ref>

[[Kite Tenjo (ARC-V)|Kite]] found Shay in [[the Doktor]]'s lab, and Shay informed Kite that the Doktor had brainwashed [[Lulu Obsidian|Lulu]]. [[Aster Phoenix (ARC-V)|Aster]] arrived as well, and Shay told him and Kite to go after [[Yuya Sakaki|Yuya]], who was following Lulu and [[Celina]].<ref name="ep126">{{episode|Yu-Gi-Oh! ARC-V|126|ref}}</ref> Shay wondered what was happening when he saw the world distorting around him, and he came across Kite again and asked him what had happened to their comrades.<ref name="ep135">{{episode|Yu-Gi-Oh! ARC-V|135|ref}}</ref> They made it outside [[Duel Academy (ARC-V)|Duel Academy]] to see the dimension fractured and ominous fog coming from the [[City (Fusion Dimension)|City]], causing Shay to wonder what was happening. They saw [[Sora Perse|Sora]] and Aster Dueling through a dimensional rift, and Shay wondered who were they Dueling. He was shocked to see that they appeared to be Dueling Yuya, but Kite explained that they must be Dueling [[ZarcZ-ARC]], and he noted that Zarc Z-ARC must have been revived. Shay realized that Zarc Z-ARC was the being that had been formed from Yuya, [[Yuto]], [[Yugo]] and Yuri]], and they moved to assist Sora and Aster. After Zarc Z-ARC fused with the "[[Supreme King Z-ARC (anime)|Supreme King Z-ARC]]", Shay and Kite arrived and joined the Duel and both received intrusion penalties as Shay's Duel Disk turning the Duel into an [[Action Duel]]. Zarc Z-ARC defeated Sora and Aster, and Shay ran to check on Sora, who lamented his failure to reach Yuya and gave [[Yuya's pendant]] to Shay. Shay promised to return Yuya to normal, and he and Kite then prepared to take on ZarcZ-ARC. Shay declared that ZarcZ-ARC's form didn't suit him and vowed to return Yuya and Yuto to normal.<ref name="ep136">{{episode|Yu-Gi-Oh! ARC-V|136|ref}}</ref>

[[File:Shay_and_Kite_defeated_by_ZarcShay and Kite defeated by Zarc.png|thumb|left|Shay and Kite are defeated by ZarcZ-ARC.]]Shay looked at Yuya's pendant, noting that Sora and Aster had believed in and fought for Yuya's heart. Kite declared that they would inherit that belief, and Shay agreed that they would bring Yuya and Yuto back. He quickly [[Xyz Summon]]ed "[[Raidraptor - Rise Falcon (anime)|Raidraptor - Rise Falcon]]" and flew up to meet ZarcZ-ARC, but to his surprise this allowed Zarc Z-ARC to Xyz Summon "[[Supreme King Servant Dragon Dark Rebellion (anime)|Supreme King Servant Dragon Dark Rebellion]]" during his turn, though the appearance of his friend's corrupted ace monster caused Shay to believe that Yuto was still present within ZarcZ-ARC. As he activated the effect of "Rise Falcon", he asked Yuto if he remembered restraining Shay with one punch in the [[Standard Dimension]], vowing to do the same for Yuto and begging him and Yuya to wake up. Zarc Z-ARC countered with the effect of "Dark Rebellion", forcing Shay to remove "Rise Falcon's" Overlay Units via "[[Overlay Burst Armor]]" to protect it. Kite noted that he and Shay could reach Yuya and Yuto through their Dueling, though Shay reminded him that the effect of "Dark Rebellion" was in the way. Shay was surprised to see [[Allen Kozuki|AllenAlan]] and [[Sayaka Saya Sasayama|SayakaSaya]] on a nearby rock, wondering how they had been transported to the Fusion Dimension. Zarc Z-ARC attacked "Cipher Dragon", Shay told Allen Alan not to panic and used "[[Rank-Up-Magic Devotion Force]]" to [[Rank-Up]] "Rise Falcon" into "[[Raidraptor - Blaze Falcon (anime)|Raidraptor - Blaze Falcon]]". In response, Kite used "[[Rank-Up-Magic Limitover Limit Over Force]]" to [[Xyz Evolution#Rank-Up Xyz Evolution|Rank-Up Xyz Evolution]] "[[Neo Galaxy-Eyes Cipher Dragon (anime)|Neo Galaxy-Eyes Cipher Dragon]]", and Shay used his own "Limitover Limit Over Force" to Rank-Up "Blaze Falcon" into "[[Raidraptor - Revolution Falcon (anime)|Raidraptor - Revolution Falcon]]" and multiply its ATK by the number of "Rank-Up-Magic" cards they had. He begged Yuto to listen to his voice, but Zarc Z-ARC used the effect of "Dark Rebellion" to return it to his Extra Deck and Special Summon two "[[Supreme King Servant Dragon Darkwurm (anime)|Supreme King Servant Dragon Darkwurm]]s" to reduce the ATK of their monsters to 0. Shay and Kite used [[Action Card]]s when Zarc Z-ARC attacked them, but the effect of "Supreme King Z-ARC" destroying them as they had been added to their hands outside the [[Draw Phase]]. Shay and Kite were defeated and blasted through the air, but they were fortunately caught by [[Gong Strong|Gong]], who had joined the Duel with [[Jack Atlas (ARC-V)|Jack]] before their defeat. Shay apologized to Sora for his failure and told Gong that it was up to him and he gave him Yuya's pendant.<ref name="ep137">{{episode|Yu-Gi-Oh! ARC-V|137|ref}}</ref>

Shay realized that Zarc Z-ARC planed to [[Synchro Summon]] during Jack's turn after Zarc Z-ARC told Jack that he had already lost by Synchro Summoning. Jack and Zarc Z-ARC countered one another's attacks, and Shay wondered what else Jack could do this turn. To his surprise, Jack and Gong were able to get Zarc Z-ARC to react to [[Dueltainer|Dueltaining]]. He was also surprised when [[New Domino City (ARC-V)|New Domino City]] materialized in the Fusion Dimension. To Shay's shock, [[Crow Hogan (ARC-V)|Crow]] joined the Duel alongside [[Sylvio Sawatari|Sylvio]], having been freed from the [[Crow Hogan (ARC-V card)|card]] that he had been sealed in.<ref name="ep138">{{episode|Yu-Gi-Oh! ARC-V|138|ref}}</ref> Shay was surprised that Crow was able to deal damage to Zarc Z-ARC and when it appeared that Sylvio had destroyed "Supreme King Z-ARC". To his shock, the [[Fusion Monster|Fusion]] [[Synchro Monster|Synchro]] and [[Xyz Monster]]s in ZarcZ-ARC's [[Graveyard]] were preventing it from being destroyed, including Shay's "[[Raidraptor]]s". Shay and Kite were surprised when [[Leo Akaba]] joined the Duel.<ref name="ep139">{{episode|Yu-Gi-Oh! ARC-V|139|ref}}</ref> He and Kite were happy when [[Declan Akaba|Declan]] managed to dealt damage to ZarcZ-ARC. However, Shay was worried due to Zarc Z-ARC turning the Duel around his way and was surprised when he thought "ZarcZ-ARC" killed Declan. He and Kite were pleased when [[Riley Akaba|Riley]] [[En Birds|turned]] all of ZarcZ-ARC's Xyz Monsters into [[Normal Monster]]s with their effects negated.<ref name="ep140">{{episode|Yu-Gi-Oh! ARC-V|140|ref}}</ref>

Following the battle against ZarcZ-ARC, Declan informed Shay of a recreation of the [[Arc League Championship|Junior Arc League Championship]], but Shay didn't care about it and he instead went to the Fusion Dimension to look for Lulu.<ref name="ep144">{{episode|Yu-Gi-Oh! ARC-V|144|ref}}</ref> He approached Leo's chambers, demanding to be let in as [[Alexis Rhodes (ARC-V)|Alexis Rhodes]] tried to calm him down and explain that Leo was trying to revive [[Ray Akaba|Ray]]. Unaware of Ray's identity, Shay ignored her and pounded on the door to Leo's chambers. Sora and Yuya arrived, and Yuya explained that Lulu was Ray's reincarnation as Yuya was of ZarcZ-ARC. Shay didn't believe Yuya, incensed at the implication that his memories with his sister were false. Yuya explained that he believed their memories were true and he challenged Shay to a Duel. Shay ignored his request, and Sora and Alexis realized that Shay wouldn't believe them, and they agreed to let him in to see Leo. Alexis asked Shay not to disturb Leo, but Shay pushed her aside and angrily asked Leo where Lulu was. Leo explained that Lulu had vanished as Yuto had when ZarcZ-ARC's fragments became Yuya, and Shay angrily grabbed Leo's shoulder and prepared to punch him. Leo replied that Shay could hit him all he wanted; he had been so caught up in reviving Ray that he had disregarded the lives of her fragments. Shay lowered his fist and he reflected that having lost Yuto and Lulu, Dueling was all that was left to him, and he accepted Yuya's challenge. (In the dub, Shay instead transferred his anger to Yuya due to his nature as a fragment of Z-ARC after Leo empathized with him). Shay and Yuya Dueled in the courtyard, and Shay agreed to accept that Lulu was gone if he lost, but ordered Yuya to get out of his sight if Shay won. Shay countered Yuya's [[Action Card]]s with his own, eventually bringing out "Rise Falcon" to destroy "[[Odd-Eyes Pendulum Dragon (anime)|Odd-Eyes Pendulum Dragon]]". Yuya revived "Odd-Eyes" on his next turn and attacked without using "[[Dark Rebellion Xyz Dragon (anime)|Dark Rebellion]]" as Shay thought he would, but Shay used "[[Rank-Up-Magic Battle Up Force]]" to [[Rank-Up]] "Rise Falcon" into "Revolution Falcon", activating its effect for a winning blow. However, Yuya survived by lowering the ATK of "Odd-Eyes" with "[[Scales Balance Magician]]", then bringing out "[[Odd-Eyes Lancer Dragon (anime)|Odd-Eyes Lancer Dragon]]" to counter "Revolution Falcon" and destroy it. Shay responded with "[[Rank-Up-Magic Doom Double Force (anime)|Rank-Up-Magic Doom Double Force]]" to Rank-Up "Revolution Falcon" into the [[Rank 12 Monster Cards|Rank 12]] "[[Raidraptor - Final Fortress Falcon (anime)|Raidraptor - Final Fortress Falcon]]". He launched repeated attacks with "Final Fortress Falcon", but Yuya endured the attacks with the effects of "Lancer Dragon" and activated "[[Cross Damage]]" to inflict the damage to both of them for an apparent draw. However, the final effect of "Lancer Dragon" allowed Yuya to survive, defeating Shay, but as Shay lost, he saw Yuya as Yuto. He accepted Yuya's hand up, but denied that Lulu was gone after witnessing Yuto's presence, (in the dub, claiming that if Yuto was still alive within Yuya, then Lulu might be to a degree as well) and Yuya agreed that he would save them. However, Jack then announced that Yuya couldn't save anyone in his current state.<ref name="ep145">{{episode|Yu-Gi-Oh! ARC-V|145|ref}}</ref>

Sora asked Yuya if he was afraid, and Shay agreed that he had felt an uncomfortable moment when Yuya didn't bring out "Dark Rebellion". Jack explained that Yuya feared using the Four Dimension Dimensional Dragons because he might integrate reunite with them again. Shay learned that his and Dennis' Duels with Yuya didn't make Riley smile as they had been intended to, and he was surprised when the [[Dimension HighwayMultiverse Speedway]] activated throughout the [[Four Dimensions]]. Crow brought Yuya his [[Duel Runner]] and Turbo Suit, and Shay watched Yuya and Jack's subsequent [[Turbo Duel]] with Crow, Sora, and Alexis. He was worried when Yuya was pushed into a corner.<ref name="ep146">{{episode|Yu-Gi-Oh! ARC-V|146|ref}}</ref> Shay bump bumped fists with Crow when Yuya won and watched his Duel with Declan.<ref name="ep147">{{episode|Yu-Gi-Oh! ARC-V|147|ref}}</ref> Shay was surprised when Yuya Fusion Summoned "[[Odd-Eyes Venom Dragon (anime)|Odd-Eyes Venom Dragon]] and when Yuya destroyed "[[Odd-Eyes Wing Dragon (anime)|Odd-Eyes Wing Dragon]]" on purpose to Xyz Summon "[[Odd-Eyes Rebellion Dragon (anime)|Odd-Eyes Rebellion Dragon]]". Shay was also shocked when he thought Yuya defeated Declan and wonder how Yuya would fight when he used the Pendulum Effect of "[[Performapal Five-Rainbow Magician (anime)|Performapal Five-Rainbow Magician]]'s" effect to lower their monsters ' ATK to 0. He watched Yuya and Declan gather action cards Action Cards to in order for one of them to win the Duel first due to "Five-Rainbow Magician's" effect. Shay was happy pleased when Yuya won , and he was sent to the [[Standard Dimension|Pendulum Dimension]] by Ray to witness her revival as Zuzu's revival and . As he watched, Shay happily realized that Lulu was happy when Lulu's spirit revived as wellindeed still alive within Zuzu.<ref name="ep148">{{episode|Yu-Gi-Oh! ARC-V|148|ref}}</ref>

Shay shows a fierce determination to rescue his [[Lulu Obsidian|younger sister]] and tends to overreact when someone mentions her. This is to the point of threatening his own best friend, [[Yuto]], for stopping him from reaching a potential lead. When he mistook [[Zuzu Boyle|Zuzu]] for Lulu, he was shocked and wondered how she "escaped" and called for her again before fainting when Yuto punched him. When he Dueled [[Dennis McField|Dennis]] and after learning that he was the one who assisted Yuri to kidnap her, he became full of rage and Dueled for her sake, showing how much he deeply loved and cared about her. This is in spite of a slightly rocky relationship as siblings; Shay once yelled at her for losing a Duel and accepting a card from her opponent, SayakaSaya.<ref name="ep119" />

|effect monsters =

* [[Raidraptor - King's Lanius]]

* [[Raidraptor - Rudder Strix (anime)|Raidraptor - Rudder Strix]] x3

|xyz monsters =

|spells =

* [[Rank-Up-Magic Limitover Limit Over Force]]

|traps =

* [[Raidraptor - EvasiveEvasion]]

A As a child, Shay played a different [[Main Deck|Deck]], with the only shown shown cards being "[[Alien Shocktrooper (anime)|Alien Shocktrooper]]", "[[Marauding Captain (anime)|Marauding Captain]]" and "[[Breaker the Dark Magical Warrior (anime)|Breaker the Dark Magical Warrior]]".

| [[HerkHerc]] || [[Yu-Gi-Oh! ARC-V - Episode 018|18]] || Win

| 8 Unknown [[Underground Dueling Arena]] Duelists || [[Yu-Gi-Oh! ARC-V - Episode 058|58]] || Win (off-screen)

| 3 [[Stomptroopers]] || [[Yu-Gi-Oh! ARC-V - Episode 063|63]] || Win (with [[Gong StrongYuya Sakaki]], [[Sylvio SawatariGong Strong]] , and [[Yuya SakakiSylvio Sawatari]])

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

| 5 [[Duel Chasers]] || [[Yu-Gi-Oh! ARC-V - Episode 096|96]] || Win (with [[Chojiro TokumatsuDeclan Akaba]], [[Declan AkabaGong Strong]], [[Gong StrongSylvio Sawatari]], [[Riley Akaba]] and [[Sylvio SawatariChojiro Tokumatsu]])

| 3 [[Obelisk Force]] members || [[Yu-Gi-Oh! ARC-V - Episode 109|109]] || Win (with [[Yuya Sakaki]] and [[Kite Tenjo (ARC-V)|Kite Tenjo]] and [[Yuya Sakaki]])

| [[ZarcZ-ARC]]/[[Yuya Sakaki]] || [[Yu-Gi-Oh! ARC-V - Episode 137|137]] || Lose (with [[Kite Tenjo (ARC-V)|Kite Tenjo]])