Thus, Kirito took part in the largest tournament in the game, the Bullet of Bullets, to attract the attention of the mysterious player.
In the aftermath of the incident, Kazuto returned with his avatar to ALfheim Online, and continued playing it with his friends.
Kirito is also a very emotional person and lets his emotions control him from time to time.
He thus became one of the 10,000 players who were trapped in Sword Art Online, where he remained a solo player for the majority of the game, willingly taking on the role of a Beater to reduce discrimination against other former beta testers, as well as actively taking part in Boss battles as one of the Clearers.
Kirito temporarily became a member of the Moonlit Black Cats after helping them safely escape a dangerous dungeon, but returned to being a solo player when a fatal error resulted in the death of the other guild members.
Kirito eventually put an end to the game by defeating the final boss, thus clearing the game.
As Asuna and a small group of Sword Art Online survivors were not logged out from Sword Art Online in the aftermath of the incident, Kazuto began playing ALfheim Online as a Spriggan due to seeing an in-game screenshot of what resembled Asuna, and thus wanting to investigate the matter.
Sachi's death in particular had a huge effect on his personality and motives, making him very distant from others for a while.
This worries his friends and allies as Kirito is someone who would let guilt ruin his life if not comforted.
He also comforts others who are scared or down such as Silica after she lost Pina.
He claims to help a female player in SAO because she reminds him of his sister, whom he feels to have forced into kendo and feels guilty for that.
Kirito temporarily loses his will to live when Asuna's character was killed by Heathcliff.
He also tries to hide his abilities, not wanting unneeded attention.
These kind of acts have earned him respect and affection from many girls.