This research reviews cutting-edge methods for creating digital humans with authentic personalities in virtual reality environments using large language models.

• Explores integration of LLMs with multimodal outputs (facial expressions, gestures) to create emotionally responsive virtual agents
• Examines applications across gaming, education, and medical sectors
• Identifies frameworks for simulating human-like personalities and emotions in digital avatars
• Highlights pathways toward more immersive and engaging user experiences

For gaming: This research provides a foundation for developing NPCs and companions with consistent personalities, emotional depth, and contextually appropriate responses—potentially transforming player engagement in virtual worlds.

Integrating Personality into Digital Humans: A Review of LLM-Driven Approaches for Virtual Reality