Over time, AI-driven companions have evolved from simple mechanical figures to interactive partners capable of adapting to user preferences. Early models offered limited responses and static poses, while modern versions use natural language processing, sentiment recognition, and contextual memory to tailor conversations. The result is a more cohesive experience, where responses reflect previous interactions, current mood cues, and specific scenarios. This evolution has been shaped by advances in sensors, actuators, and subtle feedback loops that make motion feel more natural. Focus has also shifted toward safety, privacy, and ethical use as these devices become more integrated into personal spaces. People increasingly expect a doll to remember likes, dislikes, and boundaries, while designers work to prevent harmful or distressing interactions. As companions become more sophisticated, developers explore nuanced conversation styles, improved tactile feedback, and customizable personalities. Yet, the core appeal remains the same: a non-judgmental, customizable counterpart that offers companionship, fantasy exploration, and a new layer of tactile engagement. The ongoing challenge is balancing technical capability with user well-being, consent, and sustainable design practices that respect boundaries and promote responsible use.