The hematopoietic stem cell transplantation (HSCT) process imposes a substantial psychological burden, leading to impaired emotional well-being due to intensive treatment, isolation, and immunosuppression. Patients often experience social withdrawal, loneliness, and loss of control, which may result in persistent anxiety, depressive symptoms, and reduced quality of life (QoL) if unaddressed. This study aims to evaluate the effectiveness, feasibility, and acceptability of an AI-powered robotic dog in improving emotional well-being and QoL in pediatric patients undergoing HSCT.