Stub Rock
"Let's get to work!"
This article or section is a stub and can be improved in areas such as grammar, spelling, formatting, and expanding. You can help Nanbaka Wikia by expanding it.




Biographical Information




Basic Information







168cm (5'6")


46kg (101lbs)

Blood Type


Hair Color


Eye Color




Prison Information


ID Number







Chapter 1


Episode 1

Voice Actors
Japanese Voice

Daiki Kobayashi

English Voice

Justin Briner

Nicoニコ」 is one of the main protagonists of the anime and web manga series. He is in Nanba Prison for unknowingly buying and selling drugs in the slums.


Nico a short, young man with wild, bright green hair that reaches his lower back. He has a ruddy skin tone and red eye colour, though his right eye is covered with bandages. There are similar bandages covering his neck and left hand. His outfit is a plain, orange prison suit. He is seen with a chain, with a large ball attached to it, tied around his left ankle.

Image Gallery


Nico is a very cheerful and rather innocent young man. He rarely takes anything seriously and is seen happy-go-lucky. He is a huge anime fan. He is also rather effeminate, both in terms of appearance and personality. When meeting Hitoshi Sugoroku, whom he thought was a girl, he complimented his dress. Out of all his friends, he is arguably the easiest to apprehend with the only difficulty being his eccentric condition, which causes him to have weird allergies and sicknesses. He is friendly and energetic, and one of the dumber members of his friends.

Rather childlike, he tends to complain when he doesn't get what he wants and can be immature and irresponsible-at one point when on the run with Rock, he spent most of their money on an anime figurine. In addition, he states he doesn't know how to get a job or earn money. He prefers playing around with his friends and watching anime above all else.

Later on, Nico appears to have an alternate personality when his medicine wears off. Nico becomes crazed, and out of control. He then refers to himself using the third person. In this persona, Nico has no limits to his strength and speed, causing great harm to his body. Nico is also attracted to the smell of medicine, charging at people for medicine to save his life as he views the medicine as his lifeline.


Born in the slums of America, he was born with an unusual condition that gave him strange allergies and illnesses. He was arrested for carrying and selling drugs. However, when the doctors checked his body they discovered he did not digest any drugs and was more than likely used as an unwitting courier. He was sent to juvenile hall with a light sentence and was later sent to a medical reform school to receive intensive care. However, whenever doctors tried to examine his body to treat his unusual illnesses and allergies he would get frightened by the needles and their medicine and frequently broke out of several hospitals and jails, increasing his sentence time. He is currently sentenced for aggravated escape due to the extent of the damage.

At an unknown point in time, Nico was used as a recyclable test subject as his body is able to return to normal after being injected drugs and medicine. Due to the multiple experiments performed on Nico, his brain had suffered damages, causing his body to be unable to limit the amount of strength he uses. Due to this, Nico has to take medicine to avoid destroying his own body.

At some point, he met Jyugo at a prison and then later met Rock at a different prison and became good friends with him. Later he was captured and taken to Nanba Prison and since they have some of the best doctors and medical care in the world, the doctors there give him drugs and medicinal pills to treat his illnesses, he does not feel like escaping and ironically became somewhat a drug addict.


The New Year's Tournament Arc

Building 5 Arc


  • His favorite colors are yellow and lime green.
  • He's allergic to buckwheat.[1]
  • Prior to going to Nanba Prison, he had never played video games.
  • He laughs in his sleep.
  • His name could be translated as "Second child" due to his status being the youngest of the group (or referring to his alternate personality). "Ni" means "Two" in Japanese and the "Ko" in his name might also be a reference to the five in his number as the Japanese word for five is "Go"(五) and "Go" and "Ko" have similar phonetic symbols in the Japanese language ("Go" being ゴ and "Ko" being コ).
  • Prior to meeting Jyugo, he was illiterate.
  • He likes medicine and jelly beans.
  • He dislikes bitter things and painful things.
  • His hobbies are playing video games, reading manga and collecting limited supply merchandise


  1. Nanbaka Web Manga, Chapter 13

Main Jyugo  |  Uno  |  Rock  |  Nico  |  Hajime Sugoroku
Inmates Tsukumo  |  Honey  |  Trois  |  Musashi  |  Liang  |  Upa  |  Qi  |  Fuji-san  |  Kusatsu  |  Enki Gokuu  |  Ruka Gojou  |  Hachiman  |  Ikkaku  |  Zakuro
Guards Seitarou Tanabata  |  Yamato Godai  |  Samon Gokuu  |  Kenshirou Yozakura  |  Kiji Mitsuba  |  Inori Hakkai  |  Damian  |  Mao Nimaijita  |  Nijimasu Nanairo  |  Tomato Ichijou  |  Hitoshi Sugoroku |  Houzuki Sanzou  |  Daisen Rokuriki  |  Daisen Kokoriki  |  Daisen Youriki  |  Genrou Byakuya  |  Ahato  |  Sanohana Hiiragi  |  Inohana Tsubaki  |  Shinohana Sazanka  |  Ninohana Kikiyou
Nanba Staff Momoko Hyakushiki  |  Shin Sauzando  |  Chikako Senryoubako  |  Mitsuru Hitokoe  |  Dread  | Shiro  |  Okina Otogi  |  Kazari Otogi  |  KAGU-8
Antagonists Man with the Scar  |  Elf
Other Kuu  |  Haku  |  Yamatomaru  |  Hanzou Hattori  |  Noriko Sanzou  |  Hihi Gokuu  |  Inmate 610

 | Nadeshiko Godai  | Navarin Godai