* To know more, see Undertale Wiki's page:
i'm sans.
sans the skeleton.
— Sans, introducing himself.

Sans is the brother of Papyrus and a major character in Undertale. He first appears in the forest before Snowdin.



Sans is a short skeleton with a dimpled smile and large orbits. He wears an unzipped blue hoodie, a white t-shirt/sweater, black shorts with white stripes, and a pair of sneakers/slippers. He has white pupils that disappear when he is serious or angry. When Sans uses magical psychokinesis, his left eye flashes light blue and yellow, the colors for patience and justice, and his right pupil disappears.


Sans is generally lazy despite having 3 sentry positions and running the hotdog stand, though fans have speculated this may be a cover. He has a liking for puns and knock-knock jokes.

On the Genocide Run, Sans becomes serious, threatening and fighting the player.

Powers and Abilities

He's statistically the weakest monster due to having only one attack and one defense. Despite this, he is easily the most difficult fight in the game.

He has powerful telekinesis, control over bones that can drain a person's HP depending on how many Execution Points they've obtained (Karmic Retribution). Sans can summon 'Gaster Blasters', skulls that somewhat resemble the DT Extraction machine and one of Asriel's attacks, and shoot beams of light that inflict KR. He can also summon platforms for Mario-like courses. Many of these can be summoned at once. He can also summon bones to attack the player's SOUL as they navigate the battle menu.

Sans is the only monster in the game who can dodge of his own accord, instead of you missing your blows. He dodges regardless of the power of your strike.


Sans has one attack and one defense. His attacks are very weak.

He tires out during the duration of your battle, eventually falling asleep - where you can kill him to end the fight.

go here for Japanese page/日本のページに行く

List of AUs involving Sans (Currently 130 existing AUs)


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