Haruna Kawaguchi is a Japanese actress and model under Ken-On. She is known for playing lead roles in Ouran High School Host Club, POV: Norowareta Film, Zekkyō Gakkyū, and Say "I love you".

Ouran High School Host Club is a Japanese manga series written and illustrated by Bisco Hatori. It was serialized in Hakusensha's LaLa magazine between the September 2002 and November 2010 issues. The series follows Haruhi Fujioka, a scholarship student at Ouran Academy, and the other members of the popular host club. The romantic comedy focuses on the relationships within and outside the Club.