(Character's of "yugioh gx'')

Main characters

Jaden Yuki (遊城 十代 Yūki Jūdai) He is described as an energetic, passionate and optimistic boy who comes to Duel Academy to learn to become the new King of Games. He enjoys seeking out new duel challenges and is known to be quite lucky when it comes to his draws. He is capable of communicating with Duel Spirits, most often conversing with Winged Kuriboh, a card he received from Yugi Mutou on the day of his entrance exam. He specializes in using Fusion Monsters, his main deck being the Elemental Heroes deck before later obtaining a set of Neo-Spacian monsters and his key card, Elemental Hero Neos. Following the third season, in which he entered an alternate dimension and confronted the duel spirit, Yubel, he has gained the powers of both The Supreme King, an evil alter-ego he temporarily took on, and Yubel, giving him powerful insight.

Syrus Truesdale (丸藤 翔 Marufuji Shō)He often doubts himself, living in the shadow of his older brother Zane,but has shown himself to be a talented duelist, managing to rise in the ranks from Slifer Red to Ra Yellow to Obelisk Blue. He battles using a Vehicroid deck, which in season four becomes a Cyberoid deck that he creates by implementing Zane's Cyber Dark Dragon deck.

Bastion Misawa (三沢 大地 Misawa Daichi)A duelist associated with Ra Yellow and is regarded as a dueling genius, having the top grades of his freshman applicant class. His strength is in studying and preparing for different situations, relying on rational methods. He possesses six carefully calculated decks for each Monster attribute; he claims that a single carelessly added card can throw off their balance. At the end of season three, he stays behind in an alternate dimension to help out its inhabitants. In both the manga and anime, Bastion is shown to research those he seeks to duel to devise strategies to use against them; in both cases, he found a way to seal Fusion to keep Jaden from Fusion Summoning stronger Elemental Heroes. In the manga, Bastion is shown to use a Yokai deck (the cards were later made into real life ones, labeled as Zombie instead of Fiend).

Alexis Rhodes (天上院 明日香 Tenjōin Asuka)A beautiful and talented duelist who is regarded as the queen of the Obelisk Blue. She is not elitist like many of the other Blue members, and quickly takes interest in Jaden. Later, it is also revealed that she loves Jaden. In the manga however, she shows no romantic feelings for Jaden. She duels using a Cyber Girl deck. Jaden accepted a duel with another player, and whomever won was to be engaged to Alexis, Jaden won but in the end had no idea what fiancee meant so Alexis responded " It means friends. At least for now, big guy." She also knows that Chazz has a crush on her. Alexis, along with Zane Truesdale and initially Chazz Princeton, is one of the top students at Duel Academy. She does not follow the crowd nor does she regard herself as better than other people like some students in the dormitory, but has a stern pride as an Obelisk Blue duelist. Alexis mourns for her long-lost older brother, Atticus Rhodes. With the help of Zane, the top duelist at Duel Academia, she constantly searches for clues surrounding his disappearance, until it is revealed that he joined the Shadow Riders, under the control of Nightshroud. Defeated by Jaden Yuki in a Shadow Duel and relieved of this persona, the incident leaves Atticus amnesic, prompting his sister to engage in a duel with Titan to restore his memories. Later in the series, Chazz comes out about his infatuation with Alexis after Jaden defeats the final Shadow Rider.Atticus helps Chazz with his crush and he steals all seven Spirit Keys needed to revive the Sacred Beasts in order to force Alexis to duel with him. Although Chazz plays suggestive cards such as Hidden Wish and Love Letter to show her how much he cares, Alexis wins in the end, stating that she cannot return his feelings, because she "loves dueling". Chazz's crush on Alexis continues throughout the series, although after having his free will sapped by Sartorius, his interests fade, until he is rescued by Jaden and returned to his former self. At the start of the second year, Alexis moves into a spare room in the Slifer Red dormitory to escape Dr. Crowler, who was pestering her to begin a career with her brother as duelists that sings pop songs during duels. Following Chazz's entrance into the Society of Light, Alexis duels with him to keep him from taking over Obelisk Blue completely. She fails, however, and meets the same fate as her fellow elites. Sartorius would subsequently strip Alexis of her mind completely, rendering her cold and heartless.Providing her with a new White Knight deck, he orders her to retrieve the key to the mind control satellite of Misgarth, which his good personality entrusted to Jaden, but was freed from his influence upon being defeated. During the third year, when the Academy had been transported to another dimension, she protects the school with other students from monsters while Jaden and Jesse Anderson go to the Gecko submarine to get medicine for Blair.

Zane Truesdale (丸藤 亮 Marufuji Ryō)A third-year Obelisk Blue student and the king of Duel Academy, nicknamed "Kaiser" in the Japanese version. He is the older brother of Syrus. He serves as one of Jaden's friendly rivals in the first season. However, when he loses a duel against Aster Phoenix in Season 2, he starts participating in underground duels and takes on a more aggressive personality, earning him the name "Hell Kaiser" in the Japanese version. The underground duels in which he battled using shock collars caused his heart to become weak. In Season 3 he teams up with Aster to help Jaden and his friends look for Jesse, while searching for a worthy opponent to give him one final duel before he dies. He uses a Cyber Dragon deck which he later passes on to Syrus. In Season 2, he starts using a Cyberdark deck to fit his new aggressive nature.

Blair Flannigan (早乙女 レイ Saotome Rei)First appearing in "The Maiden in Love", Blair Flannigan is a young girl who enroll into Duel Academy disguised as a boy in hopes of getting close to Zane Truesdale, her crush. After being caught by Jaden while sneaking into Zane's dorm room, he defeats her in a duel and confesses her love to Zane but is politely rejected due to her being in fifth grade. Afterwards, she leaves Duel Academy and turns her affections to Jaden, promising to return to Duel Academy and enroll when she is older. In "The Hands of Justice (Part 2)", she returns to Duel Academy in the midst of the GX Tournament to duel Zane but is again rejected and is given his GX medal. Dueling Chazz in the final match, she is defeated but is accepted into Duel Academy after proving her worth as a duelist. Blair uses a deck of girls to sway her opponent's male monsters in the first season and later uses a deck of "Egg" monsters.