Valkyrie Drive: Mermaid

Kasumi recalls how she and her partner Hibiki Kenjo, who has been in shock ever after being attacked on the island, was protected by Akira and made commander of Warter. With Akira's gender exposed, Charlotte, under Momoka's influence, declares herself the new governor, sending soldiers to capture the residents of Atelier Torino, while Momoka and her allies use a mysterious power to inspect people's bodies for something. As Mirei infiltrates Feste, having Mamori take Akira somewhere safe, she is attacked by Kasumi, who is forced to fight her upon learning that Hibiki is being held hostage by the Adel team. With Mirei having to use her Enhance ability to defend herself, Mamori manages to rescue Hibiki and reunite her with Kasumi. After Mamori joins Mirei to defeat the Adel using the Valkyrie Effect, they are attacked by Momoka.