Shay Obsidian

Shay runs a "Raidraptor" Deck, focusing on Xyz Summoning using monsters with the same name. Like Yuto, his Deck also features cards that can activate in the Graveyard. He has a considerable edge against multiple opponents due to the powerful effects of his ace monster, which takes advantage of his opponent's Special Summoned monsters, reflecting his hatred against Fusion Summoning. His Deck also features "Rank-Up-Magic" cards, allowing him to perform Rank-Ups to Summon enhanced versions of his Xyz Monsters that are geared to destroy and/or deal damage to the opponent through their effects. However since "Rise Falcon" and its upgraded forms suffer from very low original ATK, Shay supports them with many Spell and Trap Cards (including Action Cards) to prolong their longevity as well as prevent his opponents from protecting themselves when Shay's monsters go on the offensive. His skill with these cards is said to be honed through real combat experience. Following the Resistance's belief that the enemy will likely capture their allies, he includes some cards that allow him to recover control of monsters the opponent steals, such as "Rank-Up-Magic Revolution Force" and "Rescue Xyz". Shay's Deck also features a loop, focusing on Xyz Summoning multiple copies of "Raidraptor - Force Strix", using its searching abilities alongside his "Raidraptor - Vanishing Lanius" and "Raidraptor - Fuzzy Lanius" to quickly overpower his opponent with multiple monsters while maintaining hand advantag

Lulu Obsidian - Shays adoptive sister Yuto - Shay's bestfriend

Heartland was attacked without warning one day by Duel Academy from the Fusion Dimension, and without an organized defense, lost comrade after comrade to their foes until they learned to fight back. On one occasion, Shay fled from several materialized "Chaos Ancient Gear Giants" during the early days of the attacks on Heartland. He, Yuto and three other Duelists attempted to fight off the "Chaos Giants", but the other Duelists eventually lost and were sealed into cards, forcing Shay and Yuto to retreat.

Shay's homeland, Heartland City in the Xyz Dimension, was once a place where Duelists were loved and everyone enjoyed Dueling. Shay attended the Spade Branch of Heartland Duel School known for training professional Duelists. Shay was a rival to Kite Tenjo, the ace of the Clover Branch. Whenever the two Dueled, they drew large crowds of children who looked up to them.

Shay's Duel Disk possesses the ability to materialize the 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. 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 in the Synchro Dimension.

Deep inside his heart, Shay is a kind person with good intentions, but the horrors he has suffered due to Duel Academy have scarred and hardened his views deeply. Though he Dueled for fun before in a pro Duelist training school, in the present, Shay is a battle-hardened Duelist who shows nothing but fierce determination and serious perseverance in his Duels. He tends to be more sarcastic. He also carries an affection for his younger sister Lulu Obsidian whom he vows to rescue, and also highly regards his comrades. Shay acts out more recklessly and impatient and is willing to crush anyone who he deems as his enemies, even warning Yuto not to stand in his way when focused on his goal. He demonstrates a powerful hatred of Fusion Summoning. Despite his callous disposition, he can be pragmatic, agreeing to cooperate with Declan in furthering his machinations in exchange for information.

In the past, during his time at the Spade Branch of Heartland Duel School, he wore more casual clothes; a dark grey shirt under a lighter one, dark jeans, and casual sneakers.

Shay wears a Turbo Dueling suit in the Underground Dueling Arena and during the Friendship Cup. It has a dark blue and green color scheme and he wears his Resistance scarf with it.

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. used to keep his face concealed behind dark glasses and a red scarf signifying 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.