Sans

Sans is the older brother of Papyrus and lives with him in Snowdin. He runs food stands in various parts of the underground and is a regular at Grillby's.
== Appearance ==
Sans is a short, chubby skeleton with a "top heavy" rounded skull, and always has an unamused expression. His telekinesis pupil is always on, glowing a torch red. He also has sharp teeth, with one of them being his signature gold tooth.
He typically wears a carmine red turtleneck sweater under a black coat with a furry, spiky hoodie that appears to have flame-like plumes, carmine red gloves, and black basketball shorts with golden trimming. He also wears rings on his fingers hidden by his gloves, yellow socks, and red sneakers. 
His transformation involved his pupils changing over time, the left one slowly turning red and the right eventually disappearing all together. Additionally, his teeth eventually turn sharp. He seems to have always had the gold tooth from the beginning, though unknown if he was born with it.
== Personality ==
Sans is a somewhat laidback skeleton who's always on edge and overall just unamused about everything. He's very bitter about the situation he and his brother are in, blaming himself for their terrible life under Asgore. He is often very sarcastic and is extremely tired. Despite his tiredness and bitterness, Sans strives to be the cool and collect brother. 
Sans appears to like annoying others, especially Papyrus. He wears shoes because he likes the squeaking noise it makes since everyone hates it.https://underfell.tumblr.com/post/162623036901/ooh-ooh-i-got-a-question-why-does-sans-wear
As implied by Fella and Papyrus, Sans is capable of severe harm. Paired with his instability, this makes Sans very dangerous and technically the most powerful, which comes with the consequence of hurting himself the most. 
== History ==
=== Pre-UNDERFELL ===
At some point, Sans joined and worked for the Royal Scientist, Gaster, along fellow co-worker Alphys. It is unknown when exactly he stopped working at the lab, but it can be presumed it was around after Gaster disappeared. It is unknown if he quit due to the previously mentioned event.
At another point, Sans angers Asgore in some way, nearly getting his skull crushed. However, Papyrus intervenes and saves his life. Consequently, Asgore forces and manipulates Papyrus into the Royal Guard, but then punishes him (for defying him when he blocked Asgore from killing Sans) by giving him deep scratches down his left eye socket, scarring it. This is what was the "final push" for Sans, thus making his magic becoming uncontrollable and his mental state unstable, extremely distressed at what had happened.
== Abilities ==
== Relationships ==
=== Papyrus ===
Papyrus is Sans's younger brother. Though not negative, Sans and Papyrus are not close and are kept distant by Sans himself due to guilt and troubling thoughts, preventing them from having a close sibling relationship. However, they care for each other deeply; Papyrus cares deeply for his older brother and is willing to go as far as to join the Royal Guard to keep him safe. Papyrus will protect him when needed and is willing to fight anyone who messes with Sans. The two often bicker, but they never get too violent. Papyrus wishes to help Sans, but the latter refuses his help out of stubbornness. Sans blames himself for his and Papyrus's bad living situation, his magic becoming unstable and uncontrollable when the latter got his scars from defending him.
Despite them not being close, Sans loves Papyrus and deeply cares for him. However, if Papyrus were to get in trouble, he'd be there to help him. He also likes to annoy Papyrus, often playing naïve. He appears to like getting Papyrus silly gag gifts, once gifting him a "Hang in there" poster with a cat on it.
=== Toriel ===
Toriel is a close friend of Sans. He loves talking and being around her, hanging out with her presumably often.
=== Asgore ===
Asgore is Sans's superior. It can be presumed Sans resents and despises Asgore deeply for what he's done to him and his brother. He was nearly killed by Asgore at least once for calling the latter an assholehttps://underfell.tumblr.com/post/617807690892214272/what-did-sans-dosay-to-make-asgore-so-angry, leading to the events of Papyrus getting a scar. The aftermath further accentuated Sans's hatred of Asgore. He was willing to attempt to attack him after seeing him put a deep scar into Papyrus's eye, despite Asgore intimidating him.
== Trivia ==
* Sans is the only monster that isn't directly involved with Asgore that wears clothing with red and gold.https://underfell.tumblr.com/post/184104801496/also-something-ive-wanted-to-say-for-years
* Sans is the one put distance between himself and Papyrus.
**However, he will come to help him if the latter's in serious trouble.
* He is neutral about puns, but he prefers knock-knock jokes.
* He loves mustard and relish instead of ketchup.
*He is hinted to have his telekinesis pupil on at all times due to how unstable and uncontrollable his magic has become due to slowly going mad from emotional trauma and stress.
**The main source of the stress and emotional trauma is from Asgore making the underground painfully stressful.
***Gaster saying the underground's screwed played into this as well as the final push: Papyrus getting his scar from protecting him.
* Sans has tried on Papyrus's boots at least once and had "never felt more alive".
* Sans can open his mouth, but it's implied this only really happens in the No Mercy route when some sort of magic aura rises out of his mouth.https://underfell.tumblr.com/post/185949100506/i-needed-to-get-this-out-before-my-hand-fully
*In several artworkshttps://underfell.tumblr.com/post/714617234375557120/crazy-ahhttps://underfell.tumblr.com/post/618142808783634432/so-yeah-based-off-of-this-design-my-onlyhttps://underfell.tumblr.com/post/189824164416/why-d-does-utsans-have-a-gold-tooth by Fella, Sans is seen drinking a green martini, which state to either be an appletini or a honey dew martinihttps://underfell.tumblr.com/post/662807254074114048/sorry-for-asking-but-if-its-alright-to-you-could, suggesting it to be his favorite cocktail.
**For larger glasses, it's instead a margarita of some sort, possibly being an alternative for Sans to consume in larger quantity.
*Sans does not hate women.https://underfell.tumblr.com/post/652751411147358208/why-sans-hates-women-tho
*Instead of hot dogs, he sells chimichangas that are provided by Papyrus.https://underfell.tumblr.com/post/685178144112721920/what-did-underfell-sans-sells-instead-of-hot-dogs
*Sans once gifted Papyrus a "Hang in there" cat poster as a joke, in which the latter kept and hung up on the wall.
*Apparently Sans used to work at the Hotland lab with Alphys and Gaster, it is currently unknown why he no longer does.
*Grillby gives people a mini jacket if they manage to make him chuckle. It is heavily implied Sans is one of these people, as his jacket is strikingly similar to Grillby's.https://underfell.tumblr.com/post/185347151896/uf-grillby-im-not-gonna-lie-and-say-i-had-the
**Sans also wears jewelry similar to his.
*Sans may be friends with Dusttale!Sans, Horrortale Sans, and the classic Sans, but it is also implied Dusttale Sans would beat him in a fight.https://underfell.tumblr.com/post/714383579582464000/was-asked-to-draw-these-two-sans-together
*Sans may smoke cigarettes.
== Gallery ==
Category:A to Z