Tokonome Mamori is transferred to Mermaid - an artificial quarantine island for people with superpowers. When Mamori is attacked, a newly transferred girl named Mirei saves her. The enemy doesn't stop, however, and the two are soon cornered. Just when they think all hope is lost, Mirei kisses Mamori, and Mamori turns into a sword. Mirei then wields the sword and launches a counterattack against their enemies.
English: Valkyrie Drive: Mermaid
Japanese: ヴァルキリードライヴ マーメイド
Status: Finished Airing
Aired: Oct 10, 2015 to Dec 26, 2015
Premiered: Fall 2015
Broadcast: Saturdays at 23:30 (JST)
Genres: Action, Ecchi, Fantasy, Shoujo Ai
Duration: 24 min. per ep.
Rating: R+ - Mild Nudity