Kosuke Nakajima

Nakajima is thuggish and strongly associated with Nemoto's biker gang. He follows the group's aggressive social behavior rather than demonstrating the independence of more experienced hunters.

His limited participation gives him little opportunity to develop a distinct personality beyond his gang affiliation and initial confidence.

Nakajima is an ordinary human with no supernatural abilities.

Although transported into the Gantz system, he does not develop meaningful skill with its weapons or suit before the Tanaka Alien mission properly begins.

His experience illustrates that physical intimidation in ordinary life does not translate automatically into competence within Gantz.

Nakajima enters the Tokyo room with Nemoto and other members of the biker gang before the Tanaka Alien hunt.

The bikers initially treat the situation with the same aggressive confidence they use outside Gantz, ignoring how strictly the black sphere controls the participants.

Nakajima never reaches the main combat of the Tanaka Alien mission. He leaves the permitted mission area, triggering the explosive device implanted by Gantz and killing him before he can meaningfully participate in the hunt.

Tetsuo Nemoto is Nakajima's gang leader and the principal figure connecting him to the other bikers transported into Gantz.

Masaru Katou, Kei Kurono and Joichiro Nishi are returning hunters present when Nakajima and the other newcomers enter the game.