Dimitri

Dimitri, known in Japan as Kagurazaka 「神楽坂」 is a Ra Yellow student who tends to mimic other people's Decks, impersonating the owner of the Deck in almost every detail. After losing a Duel against Syrus with a copy of Crowler's deck, he decided to steal Yugi Muto's Deck from its display case during an exhibition. Despite its possession, Dimitri is defeated by Jaden with the explanation he lacked the same heart that Yugi put into creating his Deck. Apparently, the message doesn't get through, as he then goes on to impersonate Jaden. In the English dub while impersonating Jaden, he tries to do Jaden's signature pose and phrase "Get your game on!" but messes both up and says "Turn your game on!" instead.

In both versions, he actually manages to convince himself that he's Yugi, however, in the original this happened towards the end of his duel with Jaden, while in the original it happened beforehand. His first appearance (while mimicking Yugi) also mimics the duelist, down to the shape of the bangs that fall over his face and a Millennium Puzzle-esque patch on his shirt.

Dimitri could be a jab to the TCG phenomenon of netdecking and Cookie Cutter decks, as his attempts to win duels by copying the strategies and mannerisms of known professional duelists is very similar.

He made a cameo in Episode 179 watching Jaden's Graduation ceremony.

In the English dub, Dimitri mimics Yugi's voice when he uses Yugi's deck. He also refers to his Spell Cards as "Magic Cards," as this was the term used in the original Yu-Gi-Oh! series before the revised printing format of the TCG took effect. Also during his turn, the duel score from the original series is played as opposed to the GX score.

Deck
Dimitri lacks an original deck of his own and is seen playing Crowler's Ancient Gear Deck and Yugi Muto's stolen deck. However in both versions, he makes a quick reference to having used Kaiba's and Zane's decks. It is unknown how this was possible, because Seto Kaiba owns three of the four Blue-Eyes White Dragons in the anime world.