#Undertale Headcanons

[haveyouseenthisskeleton]

Can we get romance headcanons for wine, papyrus, edge, and black?

Undertale Papyrus - He knows his dating book is extremely outdated, he only uses it for comedic purposes. And guess what? It's working really well. Everyone thinks he's cute and eats in his hand. That's part of his charm.

Underfell Papyrus - Edge is extremely reticent to kiss his partner in the beginning of a relationship. Edge doesn't like being touched a lot, so he's a bit nervous about it. However, the second he realizes it's not so bad after all, he expects a kiss before you leave for work. If you forget? He pouts. He won't talk to you when you're coming home before you kiss him.

Swapfell Sans - Because Nox was raised mostly by Toriel, he learned a lot about chivalry because Toriel... Well, she doesn't really follow the new trends, you know. It means Nox will take you to masked balls and kiss your hands when he meets you. He only realizes on the Surface that it's actually not how it works anymore. But he doesn't know better actually. It's already stressing him enough.

Fellswap Gold Sans - Wine buys you expensive sexy dresses to tell you he's in the mood of woo-hoo. It's because it's so rare the dresses are really expensive. Or because he's going to steal them and wear them from time to time, so that's a gift for him too. You're just not aware.

[shouldbedrawingrn]

BEEEEEE WHOOOOO YOUUUUU AAAAAAARE📢📢📢📢📢📢📢📢📢

im having major artblock rn but we’ll see if i miraculously crawl out of it before June is over

(obv some of these are headcanons so just do with that info what you will lol)

[bicho-kromer]

The boys are getting ready

Nightmare is a Christmas hater but even he falls for the little shiny lights

The sweaters are inspired by @xpau-official Christmas comic

[stellocchia]

I saw a fair few fics where Papyrus introduced Mettaton to Sans and Sans did the whole "Overprotective father who considers his daughter property and therefore doesn't allow her any agency" act, when there's a much funnier alternative to have Sans be a protective jackass without any of the implications about Papyrus being unable to make his own choices...

Like, Sans canonically works for Mettaton guys. He does stand up comedy at his resort. And we know Mettaton isn't a great boss and the working conditions under him are not fantastic, have you guys seen Burgerpants?

He absolutely would give Mettaton shit if Papyrus brought him home! Like, can't believe that, of all people his cool little brother could have dated it was the capitalist. Smh.

Buddy would also definitely leverage that against his boss. I'm imagining things like: "If you don't give me a raise I'm gonna show up to the wedding dressed in my pajamas" "Papyrus would hate that too" "Papyrus is happy any time I get out of bed in the morning, try again buckaroo"

[cloudyskydreams]

Howdy!

I was wondering how the papyri boys (or whoever you’d like to write for!) would react to an SO who has major cuteness aggression and has no choice but to nuzzle them aggressively or bite them.

Thank you for your wonderful writing and I hope you have a lovely day/night!

I get cuteness aggression so bad sometimes

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Undertale:

Papyrus:

He's a little shocked the first time you do it and just watches in mild concern as you nibble on him.When you explain it he is so pleased he's cute enough to trigger it in you. Will accept your nuzzles and bites like it's any other form of affection and might nuzzle back into you with a skeleton kiss.

Sans:

Oh wow he's a little surprised at first y'know he's just not used to being a chew toy. Definetly makes as many biting jokes as he can anything related to teeth(I'm not creative enough to come up with some bite me (hehe)). He'll nuzzle you back gently and just accept his fate when you attack him with love.

Underfell:

Edge:

He's a bit put off at first and thinks you're having an episode the very first time. Doesn't understand what's going on when you're knawing on his bones in affection. Concerned look and slight disgust over the saliva on him the first few times but he gets used to it and just accepts it with mild exasperation. The nuzzles he can deal with better and will nuzzle you back in skeleton kisses though not as aggressively.

Red:

Absolutely thinks you're fucking weird but you're his weirdo so he's okay with it. Does not get you at all when you're straight up chewing on him but he understands this is one of your ways of showing love so he's just taking it with a grin and a head pat. Gets the nuzzles and will aggressively nuzzle you back with skeleton kisses while he holds you down so you're forced to accept them.

Underswap:

Stretch:

Thinks its nice and loves this form of affection as much as any other kind. Will aggressively skeleton kiss you back. 100% willing to return the energy. Doesn't really think of himself as cute so when he does something that's clearly adorable he's always a little surprised when you basically affectionately attack him.

Blue:

Also has cuteness aggression so he understands you. Nuzzles and bites you back just as aggressively and with just as much love. Sometimes he'll "fight" back and gently push you away or pin you down so you can't do anything and then he'll cause a counter attack.

Horrortale

Willow:

His brother has the worst case of cuteness aggression out of all the boys I write for so he's used to this. Will return the nuzzles and let you bite away at his bones as he gently pets your head. He doesn't understand what you two find so cute about him but it's kind of nice to think he's cute enough to cause an aggressive response.

Axe:

Oh yeah he loves this. Just stares at you with his big ass eyelight as he purrs loudly while you nibble on him. Nuzzles into you affectionately and so hard he knocks you over sometimes, he doesn't stop when he does either just climbs on top of you and continues the love attack.

[catboymoments]

I watched a bit of an undertale playthru today and my autism IMMEDIATELY went into overdrive so I wrote/drew out my monster species headcanons :P I love them so much can u tell

[hachikojesus]

Headcanon generator: Mettaton edition

Gotta draw a looooooot of this

[osleeplessflowero]

it's currently my birthday so here's some headcanons as to how i think skeletons would act/what they would do on YOUR birthday! (featuring a TON of au characters! :D)

Sans

Might be the one to push your face into your cake. It's a gamble with him. If it's not that, he'll definitely prank you somehow during the day (something lighthearted and fun, of course.) He wants to make sure you have a blast. I could see him getting you something funny, like a shirt with a funny phrase on it you could wear over and over.

Papyrus

He'd be the type to set up the party games, especially something like a Pinata to hit! He might hit it a liiiiittle too hard..but it's okay. Just means you get candy faster! He'd want to make your day something super fun to remember. He's dead set on changing things up each year to make each day memorable.

Red

WILL push your face into your cake, no questions asked. Provided you blew out your candles first (if you have any). He'd definitely want to take you somewhere fun for your birthday, messing with you from time to time to get a laugh. Definitely would want to get you something you could use a lot, or something you've mentioned wanting before. He keeps tabs on these things!

Edge

If he likes you a lot, he'll get you something really nice and insist you keep it taken care of, letting you know he cares in his own ways. Although he might not be as energetic as his brother might be on your special day, he still stays close by and ensures you're having plenty of fun. He's also one of the more rational members of the skeleton group, keeping the others in line so nothing goes wrong.

Blue

INSISTS on being the person to wake you up. He wants to be the first person to tell you but deep down he knows someone else beat him to it during the night, but that won't stop him from enthusiastically singing the Happy Birthday song anyway! He's probably the one to prepare you for an exciting day of fun, planned out with your best interests in mind. (His brother helped out of course by slapping some fun stickers on the schedule.) He might be one of the first people to give you his presents, letting you open it earlier in the day with him present.

Stretch & Rus

These two pretty much share a braincell, so naturally they'd race to be the first to send birthday wishes right at midnight. Funnily enough there's never an exact victor, they always send their messages at the exact same time. During the daylight hours, they stick together to cause plenty of chaos to get smiles and laughter out of you. They might pull a few pranks to tease you, but nothing too far of course. Rus would make some really cool art as a gift for you, anything you could possibly want him to draw or paint. As for Stretch, he'd work with Blue to get something you'd be able to have plenty of fun with (and of course, to use together).

Black

Oh does this man SPOIL you. He'll take you anywhere you want to go, no matter the cost, ensuring you he'll handle everything for your special day. You name anything, he'll get it for you right away. Also one of the men in charge of keeping the others in line so nothing goes too crazy. At least, until alcohol's brought out..then he leaves it up to Edge. ;)

Mars & Jupiter

The Horror bros are a bit less energetic when it comes to your birthday, opting to do something more personal for you. They'd give you their gifts alone so only they get to see your reactions. Jupiter would probably be the one to bake your cake in the first place, shooing everyone else out of the kitchen so he can perfect it. (Soo much spoon smacking..) They'd definitely steal you away a few times during the day to have some relaxing time together. Mars doesn't really like crowds..but he'd be willing to stay in a room with everyone for you.

[Berry is on his best behavior..just for today.]

Stepping out of the Neighborhood AU and into the Multiverse...

Dream, Ink, and Blue(again)!

Dream is SUPER excited for your birthday! He made sure to figure out all your favorite things so there's plenty of joy and positivity. Ink made sure to set up a really nice area for the three of you to celebrate, and maaaaybe set up some sort of water/paint balloon fights for some fun. Blue is in charge of activities and making sure Ink's chaos doesn't get too out of hand!

The Bad Sanses

Killer makes sure to be the first one to wake you up, singing the happy birthday song enthusiastically to embarrass you. Dust and Horror will be a bit more calm than he is, messing up your hair and giving you little affectionate/friendly gestures. Nightmare sets up a grand party for you, decorating the castle to the very best of his ability. He'll do his best to make things absolutely perfect for one of his favorite group members (don't tell the others, especially not Killer!). They all made sure to pitch in and get you some things that you'd thoroughly enjoy (just don't ask WHERE they got them from, okay?)

Error

He might have kidnapped you. But you're usually cool with it so it's okay. He's not particularly crazy about the idea of a big extravagant birthday party, so he sets up a day where you can spend time together watching your favorite shows in the Anti Void. As for his gift? Well, I could see him making some little puppets for you to have, maybe one of himself so when you hug it you'll think about him. (And since he's still adapting to physical touch himself.)

Cross

Cross wants to spend as much time with you as he can on your birthday. He's not one for big, extravagant things, but he would do something personal and sweet for you to make you happy, just content to spend time making you feel special. He might take you stargazing or something similar, a fun thing for both of you to do.

Bonus!

Fresh! (i will write about him at least once i swear. platonic fresh enjoyers this is for you)

You already KNOW Fresh is on top of things when it comes to his best bud's birthday! He'd definitely bring you somewhere where you both would have plenty of room to mess around and cause some chaos. No where is safe! I could see him dragging you to something like a skate park or to go spray paint some stuff. Or maybe to go see a movie together you can both laugh at. If he can't hang out with you alone, he'll show up at the Star Sanses' party to surprise you there.

[ageremoji]

Did I mention I loved undertale, at any point and time?

More Ageretale lore (kinda, more like facts?) :3

(Undertale) Sans regresses because of loosing his father due to the incident at the core, having grow up faster in order to take of Papyrus at a young age, becoming hyper aware of the world they’re living and existential dread, Frisk’s (Geno) run, and the often resets.

In Undertale, before they’re let out onto the surface; Toriel found out Sans was an age regressor before sans was even able to tell.

In moments of impure regression, which is how Toriel found out about Sans regression, (He had a huge breakdown near the ruins) She comforted him best he could and sang to him until he calmed down, then afterwards read a book of jokes and puns to him.

When they make it to the surface Frisk finds out about Sans’s regression (Papyrus accidentally told her) and She’s also cool with it, now she can hang out with her brother figure who’s interested in doing things kids her age do without him ever feeling too grown up to play with her. She also understands that this is just how Sans copes with some of the issues she’s caused, which resulted in her making a promise to never reset again.

Underswap a way different though. Sans age dreams for fun,and especially on bad days. Papyrus doesn’t mind it because he supports Sans in literally, and even admires him for being able to let out his inner child.

[scribble-brain-aced]

what if ink’s body just. warped sometimes. sometimes he’s anatomically inaccurate because a young artist somewhere just can’t figure it out. guide lines flicker across his body. sometime he has four fingers and sometimes he has five. his eye gets wonky sometimes. are his fingertips pointy or round. sometimes he touches paper and there’s a faint smear of graphite for no reason.

[haveyouseenthisskeleton]

How about some humor or family headcanons for Red and Papyrus, please?

I feel like their personalities are so different that even a quick corner store run together would have plenty of hijinks going on.

I'm not sure if you meant together or not, so I did an interaction ask.

Red and Papyrus are not very close. It's mostly Red's fault. Red doesn't even hate the guy, it's just that Papyrus looks like his brother, but he's nothing like his brother, and that's kinda disturbing?

One day Red was hanging out with Sans at home, he found by mistake a random family photo, and discovered Papyrus had an edgy period in his teenagehood, where he actually looked a lot like Edge.

Papyrus was mortified.

Red can't unsee that picture, and on his next birthday, he showed up at his door with a gift. Papyrus was a bit worried, as, you know, they're not close at all and that's somehow suspicious, but then he opened the gift and it was a copy of Edge's shoulder pads, with all the spikes and everything.

It was for mocking him, clearly, but Papyrus decided to wear them out of spite. He refused to take them off for three weeks, eventually running into Edge who immediately accused him of stealing his stuff. Because, that's actually really Edge's shoulder pads. Red tried to get rid of them by giving them to Papyrus. That failed.

Papyrus watched with extreme satisfaction as Edge screamed at his brother for ten minutes. Next time, you'll think twice before mocking him.

[indigo-flowers09]

the souls?!??1?! and in (headcanon) order of when they fell down?!?

yapping under the cut :3

CHARA, the fallen human

Fell at 9 in 1905, died at 13 in 1909

freaky little freak idk

PAULI(N)E, Patience

Fell at 8 in 1922

Might be named after that one girl from earthbound

TOMMY, Bravery

Fell at 8 in 1923

Might be named after a thumb

PAIGE, Perseverance

Fell at 11 in 1956

Convicted of killing spiders

BAILEY, Kindness

Fell at 15 in 1973

Bell bottoms ahh 😾

SVANA, Integrity

Fell at 12 in 1999

died right before Y2K what an L

CLOVER, Justice

Fell at 10 in 2005

Where are those missing humans who have been disappearing over the last century?

FRISK, The final human

Fell at 9 in 2015

What if i hit you with my cool stick

[itsmebeff]

sciencepeoples if they met in high school instead of college

couple of hcs:

- sans is in AP physics

- Alphys is probably in some high-end engineering class

- Alphys took physics too but she didn't want to put herself through the AGONY that was AP physics... so maybe physics honors

- They met in theatre class and took band together the next year

- sans was the first one to initiate conversation 'cause he thought she seemed cool

- Immediately bonded over science and engineering and quickly became friends

- He also definitely pulled the "whoopee cushion in the hand" trick on her

- sans is on good terms with basically everyone but alphys is his only ACTUAL friend that he hangs out with

- sans is definitely in some earth/space science course too, really anything astronomy related

- Went off to college together and were roommates ^^

alt:

[howlsofbloodhounds]

I know Color has given Killer thousands of rubix cubes, puzzles, and picky pads.

It’s to keep him stimulated and fulfilling ST2’s needs for “something new.” ST2 wasn’t made to be idle, he needs to keep his mind and hands working—absorbing information like a sponge, even if his apathy and dissociation probably means a much harder time paying attention and retaining that information—and Color understands that so he tries to help him find safe ways to do that in a way that doesn’t involve the poor man coming home to his friend covered in blood and possibly missing limbs.

The two of them probably engage in parallel play a lot; while Killer’s picking the small toy duckies and various colorful alphabet beads out of various ridiculously shaped resin molds, Color’s sorting and organizing them into jars by shape and color.

And later the two of them will go out to buy more resin and molds to make more picky pads and redo the activity in various forms. The different beads and mold shapes is new enough each time for Killer, and the repeated routine activity and organizing works wonders for Color’s autistic ass. Sometimes they’ll switch the roles around when Killer gets bored and definitely after he tries to eat a few of the beads.

I think Killer would enjoy the act of creation. It fulfills the need for something new of course, but it appeases his more moral personality in the form of ST1 to know his hands are able to do more than destroy and murder.

Those hands know a thousand ways to coerce confessions—both false and true—out of many monsters, but now they’re also learning to wield wood into the shape of a red panda and how to create string necklaces.

While Color’s watching his favorite comfort shows for the thousandths time, Killer’s intensely focused on a solving a word puzzle while listening to Color infodump about his favorite character in the show.

Sometimes they try to sit in silence but that quickly gets boring to Killer and he runs the risk of literally trying to disassemble his body parts, and Color gets overstimulated by too much noise, so they compromise by letting Color set the pace of the yapping.

Killer is the professional yapper in this household, but he finds listening to Color’s voice soothing and he enjoys learning more about his person. He has never found another to be as fascinating.

[voidandabyssal]

Three random Jokester Skelly boys’ reaction to not only making their crush laugh, but hard enough to make tears streaming down their faces as they wheeze through the stomach pain for the first time.

Sans:

woo boy, he's blushing, he's blushing. Oh god sEND HELP!

no, but seriously. He's definitely just fallen even harder than before. If there was any doubt about his feelings for you before then that's all been cleared up.

He pats you on the back, throwing out some more puns that he knows you'll find funny, even as you laughingly beg him to stop, he just can't! This is too great of a moment for it to end.

Axe:

woah, whatever he said must've been hilarious. Axe doesn't really remember what you said but he joins in the laughter, finding your own pained amusement funny enough.

He whips off a few more jokes, trying to find whichever one made such a reaction.

Knowing him, it was probably a really dark joke or something.

Eventually both of your laughter turns to quiet giggles and he blushes as he looks at your face. 'Damn your pretty' was all he could think.

Stretch:

At first he's in shock, he knew he was funny, enough of Snowdin laughs at his jokes. But he didn't think he was that funny.

bro's stunned, can't speak, he just watches as you cackle loudly,

Eventually you calm down and he starts teasing you about it. You tease him back about the bright orange blush he has and he shuts right back up.

You'd be worried with how quiet he is if you didn't notice the way he was looking at you.

Boy is already plotting out his next greatest joke, he wants to see that reaction again.

[cloudyskydreams]

Someone.making S/O cry UT,UF,US,HT

Hi! This one was fun to write. I think my favorites were the HorrorTale brothers they have fun personalities.Requests are open! As always I hope you guys enjoy!

Undertale:

Sans:

He's not happy to say the least. He stands by you and frowns at the dude his usual smile no where on his face as he sizes the guy up. Trys to diffuse the situation and tells the dude to basically fuck off but he's ready for a fight if it comes to that. He'll have a comforting hand on your back rubbing small circles and shapes into it. He trys to distract you with his puns and jokes and takes you somewhere comfort to chill for a bit.

Papyrus:

Oh boy. Papyrus is immediately lecturing the dude about how that isn't nice and you shouldn't make people cry. You will be getting an apology he won't be satisfied until you do. After an apology is delivered Papyrus himself apologizes to you for the situation and whisks you away with the goal of cheering you up. He takes you somewhere he knows you like and hopes to create a good memory to replace to old one.

Underfell:

Red:

First reaction is anger he's ready to go if someone made you cry. He goes in yelling getting in the person's face, he doesn't get physical right away more standing in front of you and the person protectively to create distance. You might have to reel him in because he won't back down he will die fighting for your honour. He's in a grumpy mood the rest of the day but he's still pretty sweet to you just bitey towards other people.

Edge:

Death glare shuts the person up real quick and has them going pale in fear. He separates the two of you roasting the person while he does and simply leads you away reassuring you that that trash has no idea what garbage he was spewing.He gets you a little treat and treats you extra sweet the rest of the day careful of your feelings. He's a bit more protective of you and glares at anyone who interacts with the two of you the rest of the day, which he normally does cause he has a resting bitch face but this time it's on purpose.

Underswap:

Stretch:

Hates confrontation but he won't stand for this. He comforts you wrapping an arm around your shoulder while making a snide remark about the person more complaining to you loud enough for them to hear. He then leads you away needing to remove himself from the situation as well as you before his emotions get the better of him. Takes you home and trys to take your mind off of everything by goofing around and doing stupid things like shoving whipped cream in his nose and having it come out his eyesockets. It's uncomfortable but if it makes you laugh it's worth it.

Blue:

He steps in and separates the two of you quick. Stands in front of you and very politely tells the person off and to mind their own business before doing damage control and getting you out of there. He talks to you gently and reassures you while trying to take your mind off the situation with some spontaneous activities. He's determined to turn the day into a positive one in the end.

HorrorTale:

Axe:

He doesn't really remember what was happening before this but all he knows now is his mate is crying and he's absolutely glowering at the person who did it while standing behind you. He sets a hand on your shoulder gently to comfort you while scaring the ever living shit out of the poor sap who made you cry. For the rest of the day Axe brings you little items like rocks or pretty leaves and items that bring him comfort hoping they'll help you feel better.

Willow:

He is immediately at your side with comforting and reassuring words. He picks you up and removes you from the situation, his biggest concern is pacifying you at the moment. He says the other person needs to be taught manners and if he wasn't so concerned with you they would have a very lengthy lecture to listen to right now. They would too, he's just an older version of Papyrus with way more anxiety he would have bitten into them with a nice lengthy lecture and then proceed to think about it for the next few months at 3 am when he can't sleep.