After two years of being trapped within Sword Art Online, Kirito became the infamously known as the Black Swordsman mainly due to his color choice in clothing. He proved to be a very skilled player as he became one of the “clearers” in game, participating in the front lines even when they reached the 74th floor. As a result, Kirito was awarded the unique skill, “Dual Blades” for having the fastest reaction speed in the game.
I love how the cosplayer also has the twin sword sheaths on their back. Not a lot of cosplayers would go through the trouble of making those sheaths, since they have a hard enough time making the swords! Thanks to Genie for sending this in!
Source: SAO 52pk