Aokiji

Aokiji (real name Kuzan) is a former Marine Admiral. Years ago on Ohara, Aokiji had caught the eye of one of the criminal archeologists, Nico Robin. After freezing Jaguar D. Saul to death, he helped Robin escape but gave her a warning. Twenty years later, he followed Robin to Long Ring Long Land island where she was now in the service of the Straw Hat Pirates. Aokiji fought the pirates believing they shouldn't protect her. Luffy stalled the Vice Admiral with enough time for the crew to escape. On Marineford, Aokiji was overseeing the public execution of Portgas D. Ace. When Whitebeard sent his forces in to rescue their fellow pirate, Aokiji began to freeze the bay, and even after being shattered, was still able to repair himself. After Ace was freed, he fought against Aokiji in a battle against fire vs. ice. As the battle at Marineford neared its ending, Aokiji tried to keep Luffy from leaving with the Heart Pirates. Eventually, Aokiji stood down.

Two years after, Aokiji partook in a contest to decide the next Fleet Admiral. His opponent was Akainu. In ten days, Akainu was the winner, and Aokiji resigned from the marines.

Role in Games
In One Piece: Pirate Warriors 2]], Aokiji, now Kuzan joins Luffy in his quest to free his friends.