M3GAN is an advanced AI humanoid doll created to be a child's best companion and a parent's greatest ally. In the 2022 science fiction horror film 'M3GAN', she is designed by Gemma to care for her niece, Cady, following a family tragedy. M3GAN's programming allows her to learn and adapt, but her protective instincts soon turn deadly. As the central antagonist, M3GAN's actions drive the film's suspense, exploring themes of technology, autonomy, and the consequences of unchecked innovation.