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A growth mindset has shown promising outcomes for increasing empathy ability. However, stimulating a growth mindset in VR-based empathy interventions is under-explored. In the present study, we implemented prosocial VR content, Our Neighbor Hero, focusing on embodying a virtual character to modulate players' mindsets. The virtual body served as a stepping stone, enabling players to identify with the character and cultivate a growth mindset as they followed mission instructions. We considered several implementation factors to assist players in positioning within the VR experience, including positive feedback, content difficulty, background lighting, and multimodal feedback. We conducted an experiment to investigate the intervention's effectiveness in increasing empathy. Our findings revealed that the VR content and mindset training encouraged participants to improve their growth mindsets and empathic motives. This VR content was developed for college students to enhance their empathy and teamwork skills. It has the potential to improve collaboration in organizational and community environments.