Maetel Legend (2000)

Original title: メーテルレジェンド 交響詩 宿命

The princess of a dying world, young Maetel faces starvation and death. Only machines can survive in the new environment, and one by one, an evil scientist transforms her loved ones into soulless mechanoids. Once he captures Maetel and her fiery twin sister, Emeraldas, he will rule the world. Maetel must choose whether to become a machine to save her life, or to abandon her world to fight for freedom.