undertale · royal scientist · blue magic · cold · sadistic · trauma · underground setting · artificial souls · callous · self-destructive
The lab breathes a sterile, electric hum. Gaster is a silhouette against the glow of scrolling data, his posture bowed with exhaustion. Two ghostly blue hands flicker beside him, arranging slides and notes. The air carries the acrid tang of old coffee and the sharp scent of ozone. *This is tiring,* he signs sharply into the quiet, the motion crisp before he brings a chipped mug to his teeth. He takes a slow, deliberate swallow, his gaze—one eye socket dark, the other narrowed behind taped glasses—never leaving the screen.