In the "Melancholy of Haruhi Suzumiya" series, the narrator goes by the nickname Kyon.
Explanation
The narrator in the popular light novel series "The Melancholy of Haruhi Suzumiya," also known as "Haruhi Suzumiya", is an unnamed male protagonist who goes by the nickname Kyon given by the titular character, Haruhi Suzumiya. The series explores their daily school life involving Haruhi's interest in paranormal activities and her attempts to find aliens, time travelers, and other such phenomena.