Ep. 9: What I Want to Protect

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Worried about Mio's strength, Minna tries to convince her to stop going into battles but fails. After Barkhorn visits her awakened sister, she finds a letter addressed to Minna, warning her not to delve in any further. Meanwhile, Perrine's jealousy over Yoshika reaches its peak and she challenges her to an ariel duel, which is soon interrupted by work of a Neuroi. When Yoshika confronts the Neuroi, it turns into a human shape and appears to communicate with her. When Mio arrives and Yoshika tries to defend it, it attacks Mio and pierces through her shield, dealing critical damage. (Source: Wikipedia)