Immersive virtual reality offers new ways to influence users’ emotional states in controlled and reproducible settings. This study explored whether immersive scenarios can temporarily evoke a sense of emotional safety—a process known as secure attachment priming. Priming refers to the psychological technique of activating specific cognitive representations and affective patterns using cues like images, words, or scenes. In this case, participants were shown comforting interaction between a caregiver and a child. Two versions of the same immersive scenario were developed: one with anthropomorphic avatars and another with robotic, non-anthropomorphic characters. The study aimed to assess whether the experience effectively primed a sense of security, whether the characters’ appearance influenced participants’ emotional responses, and how individual traits influenced these effects. Thirty-six adults were randomly assigned to one of the two conditions. Measures included attachment state, attachment orientation, sense of presence, and VR familiarity. Results showed that both scenarios increased feelings of security more than anxiety or avoidance, suggesting that VR can effectively support secure attachment priming. No significant differences emerged between avatar types, challenging predictions based on the Uncanny Valley theory. However, individual factors—particularly attachment style, gender, and sense of presence—significantly influenced emotional responses. These findings highlight the potential of VR for attachment-based interventions while emphasizing the importance of individual differences over avatar appearance. Future research should explore more refined designs and larger samples to clarify these dynamics.