Momoka arrives on Mermaid under the guise of a new transfer, quickly demonstrating her Exter abilities and becoming a part of Charlotte's Adel team. Quickly deducing Akira's true gender, Momoka manipulates Charlotte into confronting Akira in a battle in order to expose the truth. Noticing something about Momoka's power, Akira brings out the full strength of her Artificial Arm, Sri, against Charlotte and Momoka and manages to defeat them. However, Momoka brings out her true power as a third generation Artificial Arm, overpowering Akira and exposing her gender to everyone and encouraging Charlotte to become Mermaid's new leader, after which Mamori and Mirei discover Atelier Torino in shambles.
