First appearance: Chapter 268
Oka Hachirou is practically a legend among Gantzer pilots, especially in the Osaka Team. He's racked up an insane number of missions and has crossed the hundred-point threshold at least seven times—basically a veteran's veteran. What sets him apart is his tactical mind combined with genuine combat skill. He's the type who stays invisible and hidden until he's mapped out the playing field, specifically hunting down whoever's the strongest threat in any given fight.
His approach is smart and emotionally disciplined. If he runs into something he can't handle, he actually knows when to bail instead of letting pride get him killed.
His suit is loaded. It's got an X-ray scanner built in, palm-mounted beam weapons, and elbow blades that extend from the back. The suit's also designed to completely conceal his body, which means psychic attacks have nowhere to grab onto. He can detach his arms from the suit's larger robotic limbs when he needs to switch to different gear or weapons.
Beyond the suit itself, Oka's got plenty of firepower in his arsenal—he pilots a mecha, flies a monowheel, carries an H-gun, and uses a standard Gantz sword. He's not someone who relies on just one tool.
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