Character Profile Wikia
Series Undertale
Age Adult
Birthday April 1
Sex Male
Species Monster/Skeleton
Height Unknown
Weight Unknown
Alignment Chaotic Hero
It's a beautiful day outside. Birds are singing, flowers are blooming... On days like these, kids like you...

S H O U L D B E B U R N I N G I N H E L L.

~ Sans

Sans is a character appearing in the indie role-playing video game Undertale, developed and published by Toby Fox.


Sans and his brother Papyrus are skeletons, one day, showed up in the town of Snowdin out of nowhere in the Underground, a land below the surface of the Earth where monsters live. Unlike his flamboyant and loud brother, Sans is laid-back and pretty lazy. One day, a human child named Frisk showed up in the Underground. When they entered Snowdin for the first time, Sans was there to meet them. Sans told them about Papyrus, who hoped to capture a human to become a member of the Underground's Royal Guard, and asked if Frisk would show themself to Papyrus just to make him happy to see a human. Frisk agreed, and while Papyrus didn't capture them, Frisk befriended the skeleton brothers. However, Sans still hides several secrets and a large amount of power underneath his laziness, being the one who killed the sentient flower Flowey more times than any monster.

In Undertale's Genocide Route, kills every monster in the Underground, Sans is the only one left before they reach King Asgore, break the barrier, and escape to cause havoc on the surface. Sans states that he knows about the player's ability to save and load the game, effectively letting them reset time, and hopes that, even though he can't kill them since they'll just come back, he can still be such a difficult and unfair opponent to beat, that the player just quits the game. It is here that the reason for Sans' laziness is revealed. Because of his knowledge of the save ability, Sans has adopted an extremely nihilistic worldview. He believes that, because time can be reset just by the will of one person, nothing he does matters, since it could be undone in an instant.


Sans appears to be a minuscule and thick-boned skeleton, around the same height as the protagonist. Sans is always seen wearing a light-blue parka with a grey hood with black short pants with white lines on them, a white tank-top and salmon moccasins.

He has a huge round skull shaped similarly to a slice of bread and has large bags under his eye sockets, which have white glowing pupils floating in it. He also has a very large toothy grin, one strange thing about his skeletal body are his hands which look more like mittens rather than skeletal hands.

Powers & Abilities

  • Bones: One of Sans' and Papyrus' signature ability is to summon bones to attack their opponent. While Papyrus' were usually easy to dodge, Sans can summon large groups of them easily and with great speed, making them harder to predict and dodge by comparison. Sans can also summon blue bones that only damage people if they're moving when they touch the bones. Sans' bones can be used as projectiles and platforms, the bones unfortunatly don't do a ton of damage, only 1 damage point each, but Sans' has so man of them hitting you at once that you're likely to get drained of your HP in seconds if your not careful.
  • Soul Manipulation: Blue Mode: Another of the skeleton brothers' signature attack, Blue Mode grants Sans the ability to make enemy souls affected by gravity. While affected by Blue Mode, enemies have their movement heavily restricted, and are only able to jump to move. Sans can also use this to telekinetically lift and move his opponent, letting him slam them around with his mind.
  • KR/Karma: Sans' has the mysterious KR, where he hits you with an attack that essentially poisons you, slowly chipping away at your health, the more hits you take from it, the more health you'll lose and get chipped away over time. This can cause issues for whoever Sans is fighting, thought, luckily, healing items can cancel out the effects to an extent, potentially even nullifying it depending on how much of their health they heal, seems about right... how KR works is pretty vague, in fact, it's not even confirmed what it stands for, there's a good chance it has something to do with Karma, though, there's nothing to really indicate if the amount of blood on someone's hands changes how quickly the effect will eat away at their health.
  • Teleportation: While Sans is unable to reset the universe in the manner of someone such as Frisk or Flowey, he has shown to have a useful form of teleportation, allowing him to teleport not only himself but objects and other people, as well. During a battle, Sans will often teleport his opponent, himself, and his attacks, not only moving out of harm's way but moving his foe into the path of a new attack. He has also shown the ability to restrain an enemy by repeatedly warping them back to their initial position.
  • Strategist
  • Intelligence: Sans knows far more than he let's on. Sans is aware of the existence of alternate universes, and each time the universe he's in gets reset, he retains all of his previous memories, usually taunting the player of how many times he's killed them already, and when I say "player", I actually mean the person playing the game and not just Frisk. Because Sans is somewhat aware of the fact that he's in a game, with him even using RPG mechanics to his advantage, abusing the turn system.
  • Manipulation: Sans is also good at manipulation, at least when it came to Frisk, he had to do it, because Frisk was far gone at that point, what Sans did was fake sparing Frisk and giving them mercy... but then essentially sucker punched them after that!!!
  • Possible Scientific Mind: Sans also seems to have a scientific mind, given the Quantum Physics book in his house. And the particular friendship with the more clear scientist, Alphys.


  • Gaster Blasters: Portable laser cannons shaped like dragon skulls that Sans can summon at will. They levitate off the ground and fire at Sans' will, and Sans can summon as many as he wants. He can send out multiple at a time and surround his foe in a circle, for multiple laser beam shots.



  • Implied to have smashed a branch too heavy for Frisk to lift into pieces like it was nothing.
  • Can harm Frisk who:
    • Survived an oven exploding in their face.
    • Endured hits from Mettaton, who smashed a large hole in a steel wall without much damage.


  • Is ultimatly the fastest being in the Underground (Or atleast, he's the only one with the good sense to dodge attacks).
  • Dodged almost all of Chara/Frisk's attacks during his fight with them.
  • Reacted to an attack coming at him in his sleep.
  • Can keep up with Frisk, who:
    • Dodged spears thrown at him by Undyne.
    • Can dodge soundwaves shot at them from Greater Dog (767 mph).
    • Avoided rocks that we're traveling with enough speed to catch of fire.
    • Dodged electricity
      • Frisk can even be compared to the speed of Vulcan's electric attacks (Mach 6).
  • Sans was able to outspeed a car on a highway with his tricycle.


  • Was able to stand up and slowly limp away from a fatal knife wound to the chest.


  • Defeated and killed Flowey several times.
  • Put up a tough fight against Chara/Frisk, who can kill almost every enemy in the game with one hit.
  • Very genre-savvy, and likes to manipulate RPG tropes in battle.
  • Possesses extremely fast, almost unreadable attacks.


  • Laziness: Sans will only give a fight his all if it's absolutely necessary. He doesn't like putting effort into most anything and has even fallen asleep during battle if he has to wait for too long.
  • Low Stats: While difficult to beat due to his skill and varied attacks, Sans has the lowest stats of any enemy in Undertale, with 1 ATK and 1 DEF. Each of his attacks does one point of damage, though Karmic Retribution and the sheer number of attacks he uses at once helps remedy this. Not to mention, while he does technically only do 1 point of damage, it's one point of damage every millisecond. However, one good hit can take him out, which is why he needs to dodge to prevent getting taken out.

Fun Facts

  • Sans is most likely left-handed since he gives handshakes, holds a bottle, and uses magic with his left hand.
  • Like his brother, Sans usually speaks in the font of his own name, Comic Sans.