A virgin of the Gantz-team from Osaka, an unwitting hero who survives the Nurarihyon mission with a lot of luck. During the mission he gets to admire and idolizes Kato very much for his heroic and brave acts. His name is not given, probably for the reason, that he represents the average manga reader/otaku, who dreams about becoming a hero, doing some respectful deeds if he gets the power to.
Despite being a much more valuable rookie than any of his idols ever were, and in fact the fastest-to-clear and top-scoring average points per game player known, he continues his inferiority complex and hero worship of veteran Gantz sempais. He wonders if he could ever reach Katou, although his own shy and self-deprecating actions are consistently as brave or braver and far more selfless than Katou's (also fights Nuri 1on1, successfully saves little girl from the hell of Italy despite his terror and losing limbs protecting her, scores over 100 points in just 2 rounds to resurrect near-stranger Yamazaki for Katou's sake, loses a foot protecting Yamazaki in alien colony, attacks alien Hero in mothership while Katou stands frozen with fear and doubt, etc.).
