Busou Shinki: Armored War Goddess (2012)

S01E11 We'll Settle It Tonight! Who Is the Strongest Shinki?!

Hina’s been acting oddly, and with her return to her Maker fast approaching, the others suspect that’s the reason for her strange mood. If that’s the case, they’ll need to settle things the only way they know how—by fighting to determine who’s the strongest before she leaves for good.