Sans excels in combat and fights with unique abilities that include: KR, applying directional forces directly upon the protagonist's SOUL, and attacking the protagonist in their own selection menus.īecause of his 'research,' he has knowledge of timelines and the SAVE function. In combat, he uses ' Gaster Blasters,' devices that resemble a skull, to shoot large beams. Sans can quickly travel or teleport using what he calls 'shortcuts.' Evidence includes the quantum physics book, workshop, his relationship to Alphys, affinity for science, and his timeline research. He enjoys making skeleton-related puns and the fact that he performs at MTT Resort hints that he may be a talented comedian. He enjoys science fiction and loves to drink ketchup. He also hates making promises. He is also observant Sans reads the protagonist's expressions and can often tell when they have already done certain tasks. Though Sans is usually agreeable, he becomes eerily serious at particular moments. Conversely, he suggests that this knowledge could be 'a poor excuse for being lazy.' He wonders if his indolence stems from his knowledge that any progress he makes will be erased when the timeline resets. His laziness is a combination of fatalism and apathy.

Sans is laid-back and flippant, often sleeping on the job and taking breaks. (however he does grimace/frown upon being hit in the Genocide Route and is shown sometimes frowning in Fan-art) When Sans uses telekinesis, his left eye flashes light blue and yellow, the colors for Patience and Justice, and his right pupil disappears. He wears an unzipped blue hoodie, a white top, black shorts with white lining, and a pair of salmon-colored slippers. He has white pupils that disappear when he is serious or angered. Sans appears as a short, paunchy skeleton with a wide toothy smirk, large eye sockets.

Undertale sans colored sprite