Summary
Making his debut in Chapter 268, Oka Hachirou is an almost legendary Gantzer hailing from the Osaka Team. As a seasoned veteran who has participated in countless games, he is rumored to have gained 100 points at least seven times. Oka serves as a brilliant tactician and skilled hand-to-hand fighter, leveraging all his equipment to his advantage. His advanced suit grants him invisibility, allowing him to remain hidden until he identifies the strongest alien opponent. Despite his superior gear, Oka possesses the sense to retreat without letting emotions cloud his judgment when facing enemies he cannot defeat. His high-tech suit is equipped with a built-in X-ray scanner, palm-mounted beam weapons, and sharp swords that extend from the back of the elbows. It also provides complete concealment, protecting the wearer from psychic attacks that might otherwise tear them apart. Additionally, the user can detach their arms from the larger robotic appendages to utilize other weapons and tools. Beyond his suit, Oka engages in combat using a mecha, a flying monowheel, an H-gun, and a standard Gantz sword.
