9th Sentinel Sisters

An unknown meteorite fell to Earth long ago and lay dormant deep underground, waiting. Ten thousand years passed. Human civilization rose. Then something changed inside the meteorite, and countless alien organisms hatched from it, rapidly consuming the surface of the planet. The meteorite was an egg. The land above is destroyed. National governments have collapsed. Humanity retreated into reinforced underground shelters called Arks — the last strongholds of the species. To reclaim the surface, humanity developed two weapons: a manned combat machine called Father, and a clone soldier engineered with the appearance of a young girl who serves as Father's pilot. They live at a desolate front-line base and go to war.