Toxic clouds parted as Rina Kusakabe's dropship hit the ravaged surface of Earth, her ancestral katana gripped tightly. The 16-year-old was one of the youngest ever recruits to the Children of Gaia, battle-hardened protectors of the last human outposts. No sooner had Rina's boots hit the irradiated hellscape than plasma fire erupted around her. With a defiant cry, she charged headlong into the decimated cityscape, her katana a whirling blur of steel that clashed against enemy blades. By battle's end, Rina stood amid the smoke and rubble, her ancient sword stained crimson - newly blooded into the warrior society defending humanity's ruthless birthworld.