<p>This study investigates personality expression in neural-rendered talking-head videos. We generated eight video clips with four different expressions and two different head poses. We conducted a user study comparing pairs of these videos to evaluate differences in perceived Big Five traits across various facial expressions and head orientations. Findings indicate that facial expressions have a significant impact on perceived personality, with happy expressions receiving higher scores on socially positive traits. On the other hand, head orientation had a limited overall effect on personality perception. Participants predominantly selected the “equal” option across conditions, indicating that orientation alone rarely produced big perceptual differences. However, subtle directional effects emerged. These findings provide practical insights for the design of digital humans and virtual agents, highlighting that expressive facial cues play a dominant role in shaping personality impressions, while head orientation serves as a secondary, context-dependent modulator. These findings establish a perceptual baseline for how specific parameters in neural-rendered videos influence human trait attribution.</p>