-The name Kirito is a contraction of his real name, Kirigaya Kazuto ("Kiri" from Kirigaya and "to" from Kazuto).
-Kazuto currently lives at Kawagoe City in the Saitama prefecture with his family, though his uncle is frequently away from home.
-Kazuto has notable skill with computers, managing to build a computer from parts during elementary school, finding his erased records in the national registry at the age of ten, as well as managing to stop the SAO server from deleting Yui by converting her program into an object and storing her into his NerveGear as environmental data.
-Kazuto rides a bike which has also had a multitude of passengers including Asuna, Suguha, and Shino.
-Kirito/Kazuto usually refers to himself using the personal pronoun ore
-Kirito likes calculating random things, like the volume of the cake that he is going to eat.
-Kirito has a tendency of using a window instead of a door to exit the room more quickly, usually when he senses danger or in awkward situations, though sometimes just for convenience.
-Kirito's favorite skill is fishing. He even continues raising his fishing skill in ALO.
-Kirito has attempted to climb Aincrad via its outer wall. However, his ascent was halted by a system barrier, nearly causing him to fall to his death.
-Kirito uses a self-made PC with a 24 GHz octa-core CPU.
-If Kirito were to be an animal, he would be an orange wolf.
-Kirito's favorite food is Teriyaki chicken burgers.
-Kirito used to dislike spring onions until Asuna cooked it for him.
-Kirito said he would have went after Asuna sooner, if she had not been cute, and also regretted not going out with her sooner, as he only ate good food in SAO after getting along with Asuna.
-Kirito tried wielding three swords but gave up since.
-Kirito likes to poke on the cheeks of sleeping girls. He has already done that with Asuna,Yui and Suguha.
-Kirito said that it seemed that everyone in SAO, including Asuna, viewed him as being older than he really was and, since he had never denied it, he had trouble admitting it to her at some point in the story.
-Kirito suspected Asuna to be older than him but thought she probably viewed him older than he really was.
-Kazuto got an extremely average IQ score in the test he took during middle school.
-Ever since the second year in SAO, Kirito has been known to sleep a lot. His sleep also seems to be an "AOE" skill, as people looking at him sleeping, with Pina and Yui sleeping on him, get sleepy themselves. He himself states that sleeping when one can is the 2nd most essential point of the Aincrad-style.
-Kirito was an ideal person whom Kawahara wanted to become. Kawahara commented that he always hesitates to act, pointing out that it took him seven years to finally apply for the Dengeki Award.
-Kirito's preference for black clothing began with the first rare item he obtained from a boss drop: the black coat called the «Coat of Midnight». After that, he began to like colour black and, by the end of the game, all of his clothes were mainly black.
-According to Yui, Kirito's in-game yawns last about eight seconds on average.
-When doing Kirito's GGO character design, abec first drew him with breasts to not think of him as being male and then erased the breasts when the designs were done.
