The Japanese manga seriesNana, written and illustrated by Ai Yazawa, features a cast of fictional characters of which the two main characters share the name Nana. The series chronicles their friendship and their lives as each chases her dreams. Nana Komatsu is a small town girl who goes to Tokyo to follow her boyfriend and college friends, with the hope of having her dream life. Nana Oosaki was in a popular punk band in her home town. Nana Oosaki's friends include her bandmates in the Black Stones and her former bandmate who is involved in a band called Trapnest.
Black Stones — normally shortened to Blast — is a popular punk band within the series. Ren was once a member of the group, but, after his departure to join Trapnest, they recruit a new member, Shin. They attract a large following, and ultimately sign a deal with Gaia Records. Nana Oosaki is their main vocalist.
Nobuo Terashima
;Nobuo Terashima a.k.a. Nobu, Nobuo, or Young Master
Shinichi Okazaki
;Shinichi Okazaki a.k.a. Shin
Yasushi Takagi
;Yasushi Takagi a.k.a. Yassan, Yasu, or Baldy
Trapnest
Trapnest or T-Nest for short, is a popular band in the manga. Nana. O wants her own band to overtake Trapnest as the leading one in Japan.
Ren Honjou
;Ren Honjou a.k.a. Ren
Layla Serizawa
;Layla Serizawa
Takumi Ichinose
;Takumi Ichinose a.k.a. Takumi
Naoki Fujieda
;Naoki Fujieda a.k.a. Naoki
Supporting characters
People who have interacted with Nana K. personally at given times of her life. They do not address her with her nickname, Hachi, and have deeply affected her perceptions on certain situations. As they are not deeply involved with the two bands, she will often reflect on her experiences with them for reassurance when she is in doubt of her simultaneous loyalties to Blast and Trapnest. ;Junko Saotome ;Kyousuke Takakura ;Shouji Endou ;Sachiko Kawamura ;Nami Komatsu ;Nao Komatsu ;Natsuko Komatsu ;Satsuki Ichinose ;Ren ;Takashi Asano
Black Stones eventually sign a full contract with Gaia Records. Due to the tabloids' interest over Nana and Ren's relationship, Blast members relocated to one of Gaia's facilities and voluntarily shared housing with other talented individuals under Gaia's name. ;Gou Kanemoto ;Ginpei Shiroboshi a.k.a. Gin ;Mai Tsuzuki / "Misato Uehara" ;Miu Shinoda a.k.a. Myuu ;Yuri Kousaka / Asami Matsumoto ;Yamagishi ;Takafumi Kawano ;Shion
Cookie Music
Trapnest's official record label which is also a homage to the magazine that serialized the manga. Unlike Blast, members are assigned more managers who ensure that they meet their appointments and affirm each member's status. ;Mitsuru Narita ;Hideki Kasai ;Kinoshita ;Mari ;Takeda a.k.a. Take
Search Magazine
A magazine that shares similar characteristics to the Japanese magazine, Friday. They are a part of the "paparazzi" that track both bands. When Blast was becoming popular, they were given a leak that connected Nana O with Ren and have not stopped from spreading negative information about them. ;Kudou ;Yoshiyuki Arai ;Minoru Kurada ;Miyake ;Fumie Sugiwara
