Valkyrie Drive: Mermaid is based on Marvelous Valkyrie Drive: Bhikkhuni action hack n slash video game. Valkyrie Drive is similar to Senran Kagura (also made by Marvelous) but different concept. The plot is girls has been effect by Armed Virus and divided by two classes Liberators and Extars. Liberators are welders and Extars are weapons form by sexual intercourse. The whole scenario on people turning into weapons reminds me of Soul Eater but different. I was not new to that troupe in anime but there are others got it. The plot of the Valkyrie Drive: Mermaid is Mamori Tokonome, an Extar who was recently transported in Mermaid Island. Mamori come off an innocent 16 year old who wants to get off Mermaid Island. She has endure bullying due to her last name Tokonome (means virgin in Japanese) and during school.
Who are the main characters in Valkyrie Drive: Mermaid?
The reason Mamori is on Mermaid Island is because she is been effect with Armed Virus. Tokonome is not the only one on the Island. Mirei Shikishima is a Liberator of Mamori and 15 year old solder from an Organization. She is portrayed as emotionless and courageous to protect someone. Mirei and Mamori journeys to Mermaid Island to help other inhabitants. The Island is ruler by the Governor Akira Hiragi, who is portray as a man but later turns out to be female. Charlotte Scharsen is one of the main antagonist of the series and a member Walter. Akira wants girls who are affected with the armed virus to live in peace. Charlotte display cruel method which displeased her Commandeur Kasumi Shigure and others.