Ep. 9: Mizuki and Eiji investigate the gravity-manipulating West Tower and Ayaka's mysterious disappearance.

While Sandman’s castle undergoes repairs, Mizuki recalls her best friend Ayaka. Eiji, having recovered from Zeravire injuries, follows Mizuki to the West Tower after a medical check. Mizuki explains Ayaka’s history, noting she became bedridden after a strange accident. Inside, they find a monument resembling the Gravion’s construction site. Mizuki discovers the tower manipulates gravity, suggesting Sandman used these secrets for the Gravion. Security footage shows Ayaka vanishing without explanation. The monument activates, shaking the tower. Mizuki falls, experiencing a vision of Ayaka, while Eiji catches her but also drops. Eiji recalls a promise from his sister to meet again if he continues fighting the Gravion. Both wake up in Luna’s arms, having merely fainted rather than fallen. The team reunites in the tower as Sandman orders the Gravion to be modified for unmanned piloting.

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