Born November 18, 2005 in an apartment complex in the Atsubetsu-ku ward of Sapporo City in the Hokkaidō prefecture of Japan. He, so far, has lived as normal a life as he could manage, however he has earned a name as a delinquent at his school. He has legendary bad luck, which he blames on his name. Kochi means 'Easterly' as in the wind, and the east wind has always been associated with bad luck.
Kei was, almost ironically, lucky enough to be one of the first 1000 beta testers of Sword Art Online. In the beta test, as well as the official release of the game, Kei chose to specialize in the One Handed Dagger and Blade Throwing Set. He became very skilled in the use of the Blade Throwing Set during the Beta test that he was capable of piercing the eyes of most of the smaller and slower monsters in the game.
One month later Sword Art Onine has been released to the general public, or at least the first 10,000 players and Kei hapily logged in. Four hours into the game, the absolute change turned all the 10,000 players that logged into the virtual environment life around. Kayaba Akihiko, creator of Sword Art Online, appeared as the absolute ruler of Aincrad and he told them that this game is a death trap. Monsters are able to kill a player; suicide is able to wipe a player from the face of the real earth. All players will turn into their real bodies and the only way to escape is to clear the game.
Kei decided to try and help as many players stay alive as long as possible, however with his incredibly low Charisma, the lowest in the entire game, he isn't sure he'll be able to succeed in his endeavors and is contemplating not even trying to help anyone else.
It has also crossed his mind a number of times that, if he is unable to actively help others survive, then he'll help them through the darker way of hunting down and PKing PKers.