W.D Gaster

W. D. Gaster was the Royal Scientist before Alphys, and was stated to have irreplaceable brilliance.[1] Gaster's Followers imply that he created the CORE[2] and has disappeared. During normal gameplay, W. D. Gaster is typically unmentioned. Despite this, River Person, rare Fun Value events, and certain Inaccessible Rooms hint at his existence. This includes Room 264, named room_gaster.

In particular, Gaster's Followers relay Gaster's implied fate. One iteration says that he "fell into his creation," the second states that "his experiments went wrong," and the third claims he was "shattered across time and space." Similar to Sans and Papyrus, W. D. Gaster's dialogue uses a unique typeface, named Wingdings.

APPEARANCE

Gaster is depicted as a tall, thin skeleton standing at 6’5”. His large, misshapen skull is cracked above his right eye and below his left. He possesses six floating hands, each with a hole in the center, though his physical arms lack attached hands. His skull bears a fixed grin, though he can frown it’s simply rare. He wears a white turtleneck sweater beneath a long black robe that reaches the ground, concealing his legs.

PERSONALITY

Gaster’s personality is pieced together from fragmented lore and indirect interactions. As the Underground’s former Royal Scientist, he displayed exceptional intelligence, dedication, and focus, traits evident in his work on the CORE, the Underground’s massive energy source. He appears serious, secretive, and enigmatic.

Following his fall into the CORE and apparent erasure, Gaster’s mind seems to have shifted. While still highly intelligent, he exhibits moments of eccentricity, unpredictably switching from a cold, calculating demeanor to near childlike enthusiasm when something captures his interest.