Changes

'''Reginald Kastle''', known as '''Ryoga Kamishiro''' ({{Ruby|神|かみ}}{{Ruby|代|しろ}} {{Ruby|凌|りょう}}{{Ruby|牙|が}}, ''Kamishiro Ryōga'') in the manga and Japanese version and nicknamed '''"Shark"''' (シャーク, ''Shāku'') in all versions, is one of the main characters in ''[[Yu-Gi-Oh! ZEXAL]]''. He is one of [[Yuma Tsukumo]]'s close friends and rivals. He was originally an arrogant and callous person, but has grown quite humble. He is later revealed to be '''Nasch''' (ナッシュ, ''Nasshu''), the leader of the [[Seven Barian Emperors]]. Determined to not let tragedies befall his people again, he betrayed Yuma and his friends to safeguard the [[Barian World]]. He is currently the only remaining living Barian whose soul has not been absorbed by [[Don Thousand]].