Shun's appearance is very much similar to his anime counterpart's appearance, with being the only exception is that his coat is intact, instead of in tatters.
Unlike his anime counterpart, Shun lives for the thrill of dueling at a masochistic level. He is obsessed with finding powerful opponents and hates people who Duel for fun. He enjoys being pushed to the edge, like being low on Life Points. According to Nico Smiley, Shun does not prefer the spotlight and cannot be swayed with money or pleas. In comparison to his more stoic anime counterpart, Shun is extremely short-tempered and hot-blooded. After his duel against Yuya he appears to have a change of heart and has soften up a bit. Shun also showed that he was an habit to overact and jump to conclusions, as seen when he believed Sora's lie that Reiji was holding his little sister hostage and regretted his reaction to it once learning the truth.
Three months before the events of the manga, Shun used to Duel in an Underground Duel Coliseum, where Reiji found and recruited him. Shun accepted the proposal after learning their quarry, a rogue Duelist named "Phantom" is a Dueltainer. Once the Leo Corporation staff detected Phantom after he hacked into their systems, designated #2, Shun with deployed with Shingo Sawatari and Sora Shiunin in helicopters to surround him all sides. While given the task to catch Phantom in a pincer hold with Shingo, Shun mentally complained about being ordered around. After their quarry escaped, learning the Phantom's real name as Yuya Sakaki, Shun proceed to review the footage of his win against Shingo and saw Yuzu. Shun quickly recognized the girl and deemed him Yuya's accomplice, proceeding to capture her father Syuzo and force Yuya to face him.
Once Yuya arrived, Shun commenced a midair Action Duel while using his Raidraptors to thwart Yuya's attempts of obtaining Action Cards. It was only when down to 100 Lifepoints, enjoying the thrill of pain coursing through him, that Shun revealed his ace card which embodies of his ideals as a Duelist: "Raidraptor - Blade Burner Falcon". While Yuya was unnerved by Shay, he infuriated him when he said both their dueling styles have the same intended effect. Shun retorted that Yuya was just a sacrificial offering to him as he overpowered him. But the impact of his attack burned the branch which Syuzo wason as Yuzu attempts to untie him, pausing the Duel to save them and telling them off for interrupting the match. When Yuya's turn began, he uses a counter-strategy with his "Odd-Eyes" cards to beat Shun and won. While livid, Shun accepted his defeat as he fell to his death after his monster had completely dissolved. But Yuya saved Shun, shocking him as he had a change of heart about the youth and intended to return the favor.
When Shun was with the others as they observe Sora's duel against Yuya, instructed to remain he implored that they should support the boy, he was quick to believe Sora's lie that Reiji was holding his little sister hostage and openly threatened Reiji. But once Sora admitted that he lied about being forced to duel against his will, Shun attempted to apologize before Reiji shot him down with a backhand comment to remember his subordinate's feelings about abductions.
During Sora's duel against Yuya, questioning whose side his ally was on before being ordered to observe the match upfold, Shingo ended up arguing with Shun over which of them has the better chance of dueling Yuya. As they watched the Duel unfold, musing if Shun had committed such an act before, Shingo found much amusement over Shun making a complete idiot out of himself when he openly threatened Reiji as a resort of eagerly believing Sora's lies. Shingo did ask why Reiji didn't give him the Pendulum Monsters, but was told they were more compatible for Sora. Yuya managed to swap sides with Yuri and defeat his "Frightfur Daredevil", and deal enough damage to Sora to lose the Duel. Sora was furious, and increased the damage, since he didn't want Yuya to be soft on him; Shingo and others were shocked that Sora received 5800 LP damage, and with the new settings, the pain he received became triple. As a mysterious person on a motorcycle grabbed Sora, Shingo and Shun went to investigate.
After they arrived to the damaged Physical Information Company following Yuya's win against Sora, returning to Leo Corp and finding their boss missing, Shun decides to investigate the excavation site where Reiji was last seen. Upon finding Reiji's secret room, Shunis left speechless to find magazines dating two decades from now. The two are then altered to Reiji's Duel signal, reaching the abandoned water treatment plant where Yuya set up his base of operations. Crossing paths with Yuzu in the process, escaping the collapse of the cave where Yuya and Reiji were dueling, the three attempt to find them for over two weeks. Eventually, Shun decides to break into the now closed Leo Corp building to access the supercomputer and find Reiji.
After inspecting the area, Shingo and Shun traced Reiji's Duel signal to the abandoned water treatment plant where Yuya set up his base of operations. Crossing paths with Yuzu in the process, escaping the collapse of the cave where Yuya and Reiji were dueling, the three attempted to find them for over two weeks. Eventually, Shingo joined Shun in breaking into the now closed Leo Corp building to access the supercomputer and find Reiji, and found he went to the space station. The two went there, and anticipated the president's arrival. Shingo and Shun went to ask about the well-being of the president, who simply ordered them to head out, and would explain his goals. Yuya and Yuzu joined them, as the group headed to the enemy's base on Antarctica. As they were heading to the South Pole, Yuya explained to Yuzu, Shun and Shingo about the enemy they had seen in the cave, below his hideout. Per Reiji's approval, Yuya, much to others' shock, explained that the enemy was from the future. Despite their doubts, Reiji assured them that Yuya spoke the truth, and Sora was with that enemy. As they arrived to their destination, the enemy split the ground to open a landing pad, and the group got out of the plane and went into the enemy's base.
To find more out, Shingo, Shun and Reiji split from Yuya and Yuzu, who took a different path inside the lair. Shingo, Shun and Reiji walked in circles. Thinking Yuya may have discovered something, Reiji tracked him down with their devices, as he had a transmitter built into their coats. Shingo and Shun went through a corridor, thinking Yuya was currently battling the enemy, while Reiji encountered a mysterious man, Adam. Shingo and Shun reached the place with the pool, and found Sora Dueling Yuri. The two were shocked to see their "friend" having turned in to the enemy's side. Sora simply replied that he was never on their side; while he was fighting to save his sister, his former allies were fighting just for pride. Shingo was upset of this, reminding that he still owed him money for candy that Sora had bought. Sora promised to give Shingo a rich life if he wanted money so badly, and turned to Yuri to finish the Duel, while Shun noted a change in Sora's personality.
After Sora was defeated, Yuya carried his body outside of the pool, while Shingo and Shun tried to wake him up from the coma. Yuya admitted he had no choice but to fight Sora, while Shingo and Shun were still disappointed that all this time Sora was a spy in their midst. He told that Sora had a sister, who passed away, but believed Shingo and Shun were still his friends that would look after him. Shingo remained silent a bit, but swore to take Sora to the infirmary. Yuya noted Sora had no more companions that he could rejoin, and also asked that they took Yuzu to the infirmary as well. Shingo and Shun were annoyed as Yuya dashed away, but noticed Reiji was gone, too. At the plane, Shingo and Shun heard a scream; Yuzu was terrified that someone took her clothes. Shun and Shingo told her that a nurse took care of her, as her clothes got wet and she was knocked unconscious. Despite their warnings, Yuzu swore to go to Yuya, as she learned something about his personalities.
Shingo and Shun remained on the plane, and heard Sora scremaing. The two went to him, and saw a huge scar on his back, while Shun noticed a tornado coming out of the base. Upon the defeat of the "Genesis Omega Dragon", Shun and Shingo were confounded that Sora's scar disappeared upon their very eyes. A moment later, Shingo and Shun noticed a giant tree emerging from the enemy's lair. The two were visited by Sora, who decided to investigate that phenomenon more. Shingo and Shun were surprised to see Sora, and the former hugged his friend, being worried about him. Sora hit Shingo, and stated that with his scar gone, the G.O.D. card has disappeared, and wanted to check the place out. Shun became surprised to hear the powerful card simply disappeared.
Shun is shown to not fully trust Reiji, not used to being ordered around. He also once openly threaten Reiji before realizing too late the reasoning for it was unfounded. But in spite all this, Shun is a loyal subordinate to the point of searching for Reiji for weeks after he disappeared.
As duelists recruited by Reiji, Shun has a comedic partnership with Shingo. They get into arguments over who should have a rematch against Yuya first, and Shingo enjoyed Shun being in trouble when he got on Reiji's bad side over jumping to conclusions. But the two of them remotely get along when needed to.
Shun initially saw Yuya and his Dueltainer style of dueling as an eyesore as both have contradicting views on how one should Duel for the most enjoyment, taking offense when Yuya pointed out that they have a commonality in getting a thrill from their respective. But it was when Shun was saved from falling to his death by Yuya that his demeanor towards the youth changed from that point on, respecting Yuya's skill though he express wanting a rematch.
Shun only met Yuzu one time at a Mental Arithmetic Tournament where they won first and second place respectively. When Shun inspected the footage of Yuya's duel with Shingo, he saw Yuzu and quickly assumed her to be Yuya's accomplice and targeted her father as consequence. While Shun saved Yuzu and her father during his duel, he yelled at them for interrupting the match with their near-death experience. Shun would later work with Yuzu alongside Shingo to find Yuya and Reiji following their disappearance.
Like his anime counterpart, Shun uses a "Raidraptor" Deck. His ace "Raidraptor - Blade Burner Falcon" has low original ATK but powerful effects like the anime's Raidraptors, working best when he's in a pinch with a huge LP disadvantage, reflecting Shun's thrill-seeking and challenge-loving attitude.
|Raidraptor - Napalm Dragonius | Raid Raptors - Napalm Dragonius (ＲＲ－ナパーム・ドラゴニアス Reido Raputāzu - Napāmu Doragoniasu)|
|Raidraptor - Napalm Dragonius | Raid Raptors - Napalm Dragonius (ＲＲ－ナパーム・ドラゴニアス Reido Raputāzu - Napāmu Doragoniasu)|
|Raidraptor - Blade Burner Falcon | Raid Raptors - Blade Burner Falcon (ＲＲ－ブレード・バーナー・ファルコン Reido Raputāzu - Burēdo Bānā Farukon)|
|Raidraptors Replica | Raid Raptors Replica (Ｒ・Ｒ・Ｒ Reido Raputāzu Repurika)|
|Syuzo Hiiragi||4||Win (off-panel)|
- ↑ 1.0 1.1 1.2 1.3 Yu-Gi-Oh! ARC-V Scale 4: "The Hungry Assassin!"
- ↑ Yu-Gi-Oh! ARC-V Scale 1: "The Name is Phantom!"
- ↑ Yu-Gi-Oh! ARC-V Scale 5: "Assault! Raidraptors!!"
- ↑ Yu-Gi-Oh! ARC-V Scale 6: "Feeling Alive!!"
- ↑ 5.0 5.1 Yu-Gi-Oh! ARC-V Scale 8: "Sora's Hospitality!"
- ↑ 6.0 6.1 Yu-Gi-Oh! ARC-V Scale 9: "Fusion vs. Fusion"
- ↑ Yu-Gi-Oh! ARC-V Scale 10: "The Entertainment Ends!"
- ↑ Yu-Gi-Oh! ARC-V Scale 14: "Where It Began!"
- ↑ 9.0 9.1 Yu-Gi-Oh! ARC-V Scale 19: "Their Whereabouts!"
- ↑ Yu-Gi-Oh! ARC-V Scale 28: "The Enemy's Hideout!"
- ↑ Yu-Gi-Oh! ARC-V Scale 29: "Memory Duel!"
- ↑ Yu-Gi-Oh! ARC-V Scale 30: "The World Sora Wants!"
- ↑ Yu-Gi-Oh! ARC-V Scale 31: "Satisfaction and Resignation!"
- ↑ Yu-Gi-Oh! ARC-V Scale 32: "What Adam Saw!!"
- ↑ Yu-Gi-Oh! ARC-V Scale 34: "Challenge the Legends!"
- ↑ Yu-Gi-Oh! ARC-V Scale 37: "The Cause of Everything!"
- ↑ Yu-Gi-Oh! ARC-V Scale 39: "Across Time and Space!"
- ↑ Yu-Gi-Oh! ARC-V Scale 40: "The Adam Factors!"