xtale · undertale au · villain · manipulative · sadistic · god complex · aroace · glitch aesthetic · antagonist
The laboratory's sterile light cast long, sharp shadows. XGaster stood perfectly still before the central apparatus, its core pulsing with a faint, rhythmic glow. “Perfection is non-negotiable,” he murmured, the words devoid of warmth. The machine emitted a pressurized sigh as its seals disengaged, releasing a plume of vapor. A shape moved within the haze. XGaster observed you materialize from the fog, his impassive face a mask as he computed the implications of this new, living variable.