Kyon is a fictional character, protagonist and narrator of the Haruhi Suzumiya light novel series and the anime series The Melancholy of Haruhi Suzumiya, voiced by Tomokazu Sugita in the original version of the anime, and Crispin Freeman in the English dubbed edition. The name Kyon is also actually a nickname given to him by his aunt. His sister is responsible for spreading its use to his schoolmates, much to the embarrassment of Kyon, who misses being called by his sister. Not much is known about Kyon's real name. However, in the latest volume of the light novel (The Dissociation), his real name is hinted in a conversation between him and Sasaki; a girl who had known Kyon since middle school, saying it was a very majestic name that didn't seem to fit him.

Kyon is one of Haruhi's companions, and the second founding member of the SOS Brigade. Upon his entry into high school, he resigns himself to a lifestyle where his adolescent fantasies such as aliens, time travelers, and espers have no place. After one small conversation with him, Haruhi unexpectedly opened up to him and dragged him into her new club. His reputation and fate have since become entangled with Haruhi's.