Kamishiro Ryoga

Японское имя:	神代 凌牙
Прозвище:	Reginald Kastle, Shark, Nash

Kamishiro Ryuga is Yuma's rival and a good friend and one of the main characters who was originally a championship duelist before he was disqualified for peeking at his opponents cards, eventually becoming a delinquent and taking the nickname "Shark". Shark is now close friends with Yuma and fights the Barian threat alongside him and Kite. During his duel against Yuma, he is briefly possessed by the Number card, "Number 17: Leviathan Dragon", but Astral takes it from him after Yuma defeats him. Like his namesake, he uses a deck filled with fish-type monsters, many being based on water and darkness, his key card being "Black Ray Lancer". This Xyz monster is normally unable to destroy Numbers, but Shark seems to have put some workarounds into his deck, such as the Spell card "Armor Xyz", which equips an Xyz monster with a second one, giving the first its attack points and Number status if the equipped monster is a Number. Shark eventually obtains "Number 32: Shark Drake" to use as his new ace card. He later gains the ability to evolve "Shark Drake", much like how Yuma can evolve "Utopia", but, rather than through the feeling of love, Shark acquired it through feelings of hate. After this, Shark can summon "Chaos Number 32: Shark Drake Veiss" at will. He then later obtains a new ace "Number 73: Abyss Splash". He is later revealed to be Nash, the leader of the Seven Barian Emperors.

Voiced by: Toshiki Masuda (Japanese), Gary Mack (English)

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