About Kyon

Kyon is intelligent and perceptive enough to make some sense of Nagato's facial expression, and was able to solve the mystery in Lone Island Syndrome. However, he does poorly in school, at least in part due to a lack of willingness to study.

Kyon clearly has some control over Haruhi's emotions, given that he was able to stop the looping in "Endless Eight" by first catching her attention and then inviting the rest of the Brigade to come over to his house to help him with his homework. He also gets her to stop bringing fictional elements into reality by having her add a disclaimer to the movie stating that the events are fictional. Itsuki has given him "responsibility" for controlling Haruhi's emotions, something which Kyon does not always agree with.

Apparently, in middle school, Kyon had dreams that people like aliens, time travelers, and espers existed.

At his middle school, he knew a girl named Sasaki, but didn't really become friends with her until they went to cram school together. He tried to explain these dreams (about aliens, time travelers and espers) to Sasaki, but she only denied their existence. By the time Kyon got into high school, he put those dreams behind him.

At North High, Kyon tries to make small talk with the girl sitting behind him - Haruhi Suzumiya, after she introduced herself in a strange manner—only wanting to associate with aliens, time travelers, espers and sliders. She wondered if she had met him before but otherwise dismissed him as an ordinary person. He was able to converse with her when he noticed other examples of her oddness, such as changing her hairstyle in order to get the attention of aliens. He gave her the idea of forming her own club, which eventually resulted in her dragging him into founding the SOS Brigade and recruiting members. Kyon soon finds out that her new members - Yuki Nagato, Mikuru Asahina, and Itsuki Koizumi, are in fact an alien, a time traveler, and an esper respectively. Kyon has a hard time taking this all in, but eventually the others come to prove their identities, especially Itsuki, who shows Kyon that Haruhi can alter the world and create closed space, in which "Celestials" destroy what is within and possibly create a new world.

When Haruhi sees Kyon wrestling with Mikuru over a computer mouse, she becomes jealous and triggers a closed space consisting of only herself and Kyon in the school; Kyon, however, uses clues from Yuki and a future Mikuru to get out by kissing her and convincing her to bring the old world back. Afterward, Kyon witnesses the development of several issues around Haruhi, some of which Kyon solves and some of which the others solve.

In Bamboo Leaf Rhapsody, Mikuru took Kyon three years back in time, where he helped a young Haruhi draw her infamous design at East Junior High. When she asked him his name, he called himself "John Smith" (ジョン・スミス, Jon Sumisu), an obvious pseudonym which she derided. He also suggested she could meet interesting people at North High.

In The Disappearance of Haruhi Suzumiya, Kyon is thrown into an alternate universe in which Yuki, Mikuru, Haruhi, and Itsuki are normal humans, Haruhi and Itsuki attend a different school, and there is no SOS Brigade. Kyon considers staying in this alternate universe for good and joining the Literature Club, but eventually decides that a world with the SOS Brigade is still more interesting and fun, no matter how annoying it is.

In Love at First Sight, Kyon witnesses someone falling in love with Yuki, and remains jealous of him even after it is revealed that the person did not love her but actually became confused by seeing the Integrated Data Sentient Entity. Kyon thinks about his relationship with Yuki and partially admits that he has feelings for her.

In The Melancholy of Mikuru Asahina Mikuru recruits Kyon to rescue a child, but cannot tell him her real reason for inviting him out due to her orders from the future. Kyon prevented the boy from being run over by a truck, implied to have been driven by rival time travelers.

The future version of Mikuru informs Kyon in The Intrigues of Haruhi Suzumiya that Kyon will soon be forced to make a choice that determines the fate of the future.