John Rolfe - the so-called ruler of Nemesis and the wielder of the Black Moon Diamond
John Rolfe is a major antagonist turned protagonist in the Kingdom Hearts Unlimited Saga, first appearing from behind the scenes in "A Year of Misery" as part of the leadership of the Order of the White Rose before its later merger with the Dominion XIII in "An Empire of Dreams".
The son of an English diplomat in league with the Order, John had been one of Frollo's most loyal followers in the belief that the universe had become diseased with corruption and filth borne from the Negaforce Darkness, and that it needed to be purged by any means necessary so that the inhabitants of each and every star-system can truly be saved from their own innermost nature. It isn't until the events of "Empire" and "The Fantasmic Dreamtime" that Rolfe realizes the true depths of Frollo's fanaticism and how they both had been used as pawns by Emperor Zurg and the Wiseman for the Grand Plan enacted by the Sith Order. To redeem himself of his past mistakes, John allies himself with the Highwind Crew to stop the mad emperor's multiverse omnicidal plans and hopefully bring back the true order that he always dreamed of.
(A combination of Prince Diamond and the Ansem-Riku merger seen in KH II)