Kyousou no Simulacra

A teenager named Kurikura Kansuke lives in a village with his family until his younger sister, Ayame, is killed. Six years later, while searching for his missing older brother, Kansuke encounters several women who claim to be Ayame. He discovers that his brother, overwhelmed by grief, constructed dolls using parts of Ayame's body, enhancing them for battle. Determined, Kansuke resolves to locate his brother and end the cycle of senseless violence.