Realistic Emergency Aid & Collaboration Training System (REACTS) is a training platform to enhance the skills of medical professionals in varying levels of stressful situations. Leveraging the immersion of XR and generative AI, REACTS creates a realistic and interactive training environment for several different stress scenarios. The prototype enables three to four users to collaborate in various roles. The primary user and the first responder will navigate the virtual environment and perform hands-on medical training such as “stop the bleed” or mental health advising. The secondary user plays the role of a 911 dispatcher and guides the primary user through voice communication while another user acts as a remote medical expert or another on-site responder to offer specialized guidance. An optional fourth user can also be included within the scenarios to provide variability to the training, enhancing learning capabilities and adaptability.