Ep. 11: Riot Force 6's Day Off (Part 2)

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Nanoha, Fate, Shamal, Teana, and Subaru come to aid Caro and Erio. Erio, Caro, Teana, and Subaru go down the sewer to investigate. They meet up with Subaru's sister, Ginga, but things take a turn for the worse when Lutecia attacks in the sewers with the powerful insect Garyu. (Source: Wikipedia)