Nana Komatsu (小松 奈々, Komatsu Nana?) is a fictional character in the manga/anime series, NANA, by Ai Yazawa. She is the titular "Nana" of the series, along with Nana Osaki.
To disambiguate between the girls, she is generally referred to as 'Hachi' by her friends, and the English-language publisher of the manga, VIZ Media, uses Nana K. to refer to Nana Komatsu.
Read more about Nana Komatsu: Character, Personality, Voice and Live-action Actresses, Trivia