Kazuto Kirigaya  

He was the first one to be called a Beater, a combination of beta testing and cheater, as he had great knowledge of the game through the beta test period and showing great skills in floor clearing but chose not to help other players. He had it imposed on himself so as to differentiate the beta testers who were just picked in the testing and the serious gamers who use the knowledge efficiently like a cheat. He has a unique skill called "Dual Blades" which allows him to dual wield two swords and use Swords Skills. It's the special skill designed for the Hero that defeats the Demon Lord at the last floor. He found it in his skills list after a year in the game. After nearly mastering it, he only uses it in emergencies to avoid attention for being one of the few people to have a unique skill.He befriends a girl by the name of Yuuki Asuna who later becomes his lover. He has a unique skill called "Dual Blades" which allows him to dual wield two swords and use Swords Skills. Its the special skill designed for the Hero that defeats the Demon Lord at the last floor. He found it in his skills list after a year in the game. After nearly mastering it, he only uses it in emergencies to avoid attention for being one of the few people to have a unique skill.He befriends a girl by the name of Yuuki Asuna who later becomes his lover. His birth name is Narusaka Kazuto (鳴坂 和人) which was revealed for the first time in the 21st volume titled UNITAL RING I .Narusaka Kazutos biological parents died just one year after his birth, in an accident (details about the accident is unspecified) ,as such he was adopted by his aunt and uncle. In the 10th volume of the Accel World novel and the 5th volume of the Accel World manga, Kirito is featured in a special chapter, in which he fights Silver Crow, the burst linker. In the chapter, Kirito is playing as his old SAO avatar, wielding the Elucidator and Dark Repulser.