Jaden Yuki, known as in the original Japanese language version, is a fictional character and the main protagonist in the Yu-Gi-Oh! GX anime and manga series. His name is meant to be a pun in Japanese, as "jūdai" is the word for "teenager". In the English version, Jaden is voiced by Lucas Gray (credited as Matthew Charles), while KENN (older) and Mariko Nagahama (younger) take the role in the Japanese version.
The series' main protagonist, Jaden was originally portrayed as a carefree and talented fun-loving duelist with good instincts and incredible luck throughout the first three seasons. At the end of the third season and the subsequent fourth season, Jaden discovers his past incarnation as a king with an evil alter-personality destined to wield the power of darkness. This results in him becoming more serious and brooding, as well as losing some of his enjoyment of dueling. After some time with this personality, his friend Alexis Rhodes helps Jaden recover and he regains his normal and enthusiastic personality, although he remains more serious. Jaden is also memorable for his catchphrases, most notably "I'll throw down a facedown" when setting cards, "Get your game on" or "lets throw down" when beginning a Duel,and "That's game" when winning one (all three only in the dub version). In the Japanese version, he uses the phrase "Gotcha". Also, in the English anime, he says "Here goes something!"
Having fused with Yubel, Jaden has become a being unlike any other in the Yu-Gi-Oh! universe: half-human, half-Duel Monster, and is described by Satorius and Kagemaru as a being transcending beyond human limits. As stated, he gains inhuman powers on par to those of the Millennium Item wielders, especially Yugi Mutou and Ryo Bakura. His powers include materialization of Duel Monsters, immunity to hypnotism and other mental attacks.
The Yu-Gi-Oh! GX anime begins with Jaden, intending to attend Duel Academy, bumping into the protagonist of the original Yu-Gi-Oh! series, an obscure Yugi Mutou, on his way to the school's entrance examinations, being late and rushing. Yugi gives him a Winged Kuriboh card. Jaden receives a low score on the exam's written component, and is therefore placed in Slifer Red, the lowest-ranked dormitory, alongside characters Syrus Truesdale and Chumley Huffington, who become his new friends. Jaden makes several enemies at the Academy, including Vellian Crowler, whom Jaden defeats in his examination duel. Out of spite, Crowler tries to kick Jaden out of school on many different occasions before finally beginning to respect him. Jaden is shown to be an accomplished duelist, defeating the beforementioned Crowler during his examination duel, Chazz Princeton in a school-wide duel, and Bastion Misawa for the representative position in an inter-school duel, both of whom received higher grades than he did and represented the higher-ranked dormitories. He also defeats most of the Shadow Riders.
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