Ep. 1: The Knights' Battlefield

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On the evening before a great battle, Priecia and Hyaweh are confronted by a woman known as Sister Hell. She engages in a fight to try and eliminate them, but is interrupted by the arrival of several of Priecia's allies. It is then that Sister Hell decides to unleash a new mechanical weapon against them, and Priecia's group is faced with a difficult enemy to defeat. (Source: TV.com)