Reginald Kastle
Japanese 神代凌牙
Rōmaji Kamishiro Ryōga
Nicknames * Shark
Age 14
Gender male
Anime debut Yu-Gi-Oh! ZEXAL Episode 1
Manga debut {{{manga debut}}}

Reginald Kastle is One of the main characters who was originally a Pro 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.


National TournamentEdit

Reginald gets banned from the National Circuit

Reginald getting qualified from Nationals.

Some time before the events in Yu-Gi-Oh! ZEXAL, Reginald was a well-known duelist in the National Duel Circuit. Reginald wanted to win and prepared in the break room to his next duel. When he heard someone from the room, he saw that it was the IV lost his deck. Shark was at that moment nothing else, looking at the cards of his opponent. When it came to the duel was canceled because of this rule violation was recorded by surveillance cameras and later. Shark was disqualified and was now known as a cheater. The fact that he lost everything that was important to him because of an error. He was angry and wanted to leave to vent his anger on others around him to suffer just like him. Therefore, he urged others since duelists to duel with their decks or their most prized possession was wagered. Then Reginald was then took the nickname "Shark".