Valkyrie Drive Mermaid (2015 Anime) - Season 1 - Episode 8

In this 12-episode installment, the narrative explores the Valkyrie Effect, a state of peak synchronization that grants Mamori and Mirei unmatched power. As they liberate other girls from the island's hierarchy, they move toward a final confrontation that threatens the very existence of the facility. The finale provides a high-stakes resolution, with the pair vowing to help other virus carriers worldwide.