The individual who was part of the initial group that defeated the first-floor boss during the raid party. In the first gathering, this person openly criticized those beta testers present, demanding an apology from them for not contributing their knowledge to other players in SAO and hoarding the most productive hunting areas.
He was also the one who was striking a deal with Kirito to buy his sword but Kirito later found out that Kibaou was just being used by Diabel to draw him out as a beta tester.After the boss battle, he had Asuna tell Kirito that he does not acknowledge him and will still best him in the next boss battle.
He stages a coup on the leader of the Army Sinker, and seizes control. He also ordered the army squad led by Cobert to take on the 74th floors boss.