In the dub, Jaden has several catchphrases associated with him. In the Japanese version, Jaden rarely uses honorifics, and his speech pattern could be considered rude as a result, similar to Joey Wheeler's. His Duel Disk now fully customized, has red outlines on it, though otherwise it looks the same (although the difference is very noticeable). His eyes have also been slightly redesigned. He comes back with longer hair, a longer, darker Slifer Red jacket, darker pants and, since he fused his soul with Yubel in the third season, occasionally manifesting its power to protect himself in the form of his eyes glowing the same bichromatic scheme Yubel's did. In the fourth season, Jaden is seen with his new look, but he is still easy to identify from the past seasons. He carries an Academy-issued Duel Disk on his left arm. His brown eyes are positioned directly beneath the bangs of the layer closest to his face.
In the first episode he is seen wearing a high school uniform similar to the one worn by Yugi Muto, though colored black instead of blue.
A Deck box is strapped above his waistline, largely hidden beneath the lower rim of his jacket. In season four, the normal Slifer Red uniform pants were replaced by jeans. Jaden's usual outfit consists of the standard Slifer Red uniform, unbuttoned, and a black shirt underneath. Jaden's character design was overseen by Kenichi Hara. Jaden Yuki, known as Judai Yuki in the Japanese version, is a headstrong, fun-loving, and talented Duelist, who is the main protagonist in Yu-Gi-Oh! GX and the reincarnation of The Supreme King.