The author’s research advances human-AI interaction across two innovative domains to enhance the depth and authenticity of communication. Through Emotional Validation, which leverages psychotherapeutic techniques, the research enriches SDSs with advanced capabilities for understanding and responding to human emotions. On the other hand, while utilizing Embodied Conversational Agents (ECAs), the author focuses on developing agents that simulate sophisticated human social behaviors, enhancing their ability to engage in context-sensitive and personalized dialogue. Together, these initiatives aim to transform SDSs and ECAs into empathetic, embodied companions, pushing the boundaries of conversational AI.