#undyne x reader

[jampop01]

guys I require requests please.. I’m very very bored

(Not really I just wanna write smth but please request)

I’m mainly into sonic right now but y’all can request Undertale any other aus too. Just my two current hyperfixation rn sonic being #1 and undertale being #2

[readersregrets]

Can I please get some head cannons of various undertale and if you want undertale yellow characters reacting to a reader who is successful in hunting down and killing a genocidal human, using one of those canisters or whatever the soul containers are called to collect the soul? The catch is that the reader is a human themself hiding in plain sight disguised as a fellow monster. If it wasn't for the monsters the reader befriended they wouldn't have bothered to intervene. After all it could have provided the perfect distraction for escaping.

Thanks!

UNDERTALE X Human Reader

💀🪶🐟🦊👑⭐

Monsters and humans do not fight in the same way that humans and humans fight each other. This is something you probably should have been able to piece together a while ago. However, you think, perhaps, it was for the better. You’re not sure if knowing in advance that you would be using your bare hands to kill this human would have changed anything.

Papyrus is clearly distressed at the sight of you two, but he is bound by the rules of the fight and cannot move until the human has taken their turn to do something significant. You are a little surprised that clawing at your hands around their throat doesn’t count. You really didn’t want Papyrus to try to stop you. He was already pretty beat up by the time you got here. You are also worried about what happens after this. You find yourself in a daze as you strangle this small human. Whether it’s the shock of killing someone or just seeing another human after so long, you realize you’re not thinking straight. Most people aren’t trying to plan out their next few hours while killing a child, after all.

Of course, this human isn’t completely helpless. They managed to land a few good hits on you before you knocked them onto their back. All the monster dust on their hands smeared all over you. The EXP and LOVE they've gained must have given them a pretty good boost, because you're pretty sure they had enough strength to dislocate something in your knee. And then there’s the stupid toy knife buried in your calf. Papyrus isn’t stupid, despite what some might say. He knows the rules of a fight. He's probably realized you shouldn’t have been able to approach the way you did without being some kind of outlier. The red liquid coming out of your body is also a pretty big clue.

It doesn’t help that when they finally stop resisting, the same liquid trickles from the human's nose. It’s kind of funny when you think about it. Undyne once told you how gullible and ignorant Papyrus is, yet he’s seen worse things than she has. He figured out you were a human before she ever did. Right now, you don’t think you’re a good person anymore. It doesn’t really matter now. You make sure to press down as hard as you can for a few more seconds. It’s difficult to do in the snow, but you don’t stop until you hear the crack of their neck.

The monochrome black magic surrounding you finally fades away. You’re not really sure what happens next, but you think dully that you probably deserve whatever comes. Papyrus does not move from his position. He is staring at you or, more accurately, at the dust on your hands. You don’t think he has ever actually seen a monster’s dust before. It’d be okay, you think, because you haven’t either.

You should really get out of the snow. You take off your signature cloak, the one every monster in the underground recognizes, and lay it flat on the snow. You roll the human’s body onto it and wrap it up. They needed to die. You know that. But you’re not sure they deserved this. You docked near the edge of the waterfall. If you can just get the body to the boat, you’ll have it in New Home for Asgore before the cold can even settle into it. You feel sick, but there’s nowhere to be sick, and with the way monster food works, you don’t think you even can.

“You should go home,” you say to Papyrus. Your voice is much steadier than your legs. “Go check on your brother. I’m sure he’s worried sick.” You don’t tell him that you’re worried, too. You like Sans, and you know he’s smart enough not to pick fights with any humans who come through. But that doesn’t mean he can’t be caught unaware. He didn't even notice when you grabbed a container from that little lab in his house.

Papyrus barely manages to get a full sentence out before he sprints back toward Snowdin Town. You don’t look at the body in your arms as you walk. You don’t think about the marks you probably left on their neck. They were so small. How could something so small do so much damage? You snuck into the castle once before you understood what the barrier really was. You never saw the king, and you’re glad for that. You’re not sure how wisely you would have acted after seeing so many small coffins in one basement. At least you’re glad they were made.

💀 💀 💀 💀 💀

The moment he saw the not-sauce, the way you moved outside of combat, and the fact you were able to enter a fight in the first place without adhering to the magic's rules, the pieces fall into place for him.

Papyrus isn't like his brother. He isn't some kind of super cool genius who can do so much math in his head in rapid succession that he can predict dice rolls and the next monster to walk through Grillby's door, but he tries his best to be observant when it comes to the people he cares about. Seeing you kill the little human horrified him, not because the human didn't deserve to be stopped. He understands exactly what that human was doing. What devastates him is watching you do the same thing, because of him.

Papyrus knows you saved lives, but he also understands that you'll likely carry this burden forever. When he learns that you only intervened because he was in danger, he tries not to think about Chilldrake or Dogamy or Dogaressa and how you didn't care enough to save them.

The least likely to attack you or even tell anyone your secret, hes too busy trying to help all the other monsters as a royal guard now that the threat is gone.

🪶 🪶 🪶 🪶 🪶

Martlet takes this the hardest, even more so than Papyrus. She is already prone to guilt and tends to second-guess herself. She had been helping residents in Snowdin evacuate when she found out that her friend was secretly human is a shocking revelation. Learning that you have killed the other human pushes her completely out of her depth. For a time, she honestly doesn’t know what to do. She's afraid of you, and that is what hurts the most. She wishes she wasnt afraid. It would be easier that way. Instead, she sees someone who is exhausted beyond words and has dust on their hands.

When she learns that you only intervened because Papyrus nearly got himself killed, she begins to cry. It’s not because of the dead human. It's because she wasn't there to stop him. It's because none of her traps worked. It's because you genuinely considered letting the genocide happen. The idea that you were prepared to abandon the situation until your friends became targets is terrifying. Did you really never care? Did you not feel safe here? that you never truly believed you belonged? This realization fuels Martlet’s determination to prove otherwise.

Probably the most impacted by you killing the human, shes already insecure about her ability to help people, the fact she didnt even realise you were human is going to damage her self asteem badly.

🐟 🐟 🐟 🐟 🐟

Undyne's initial reaction is, of course, one of fury. The moment she realizes you’re human, she is already halfway through drawing her spear. Then she sees the body and you holding the collected soul and the strange human ooze all over you. One human is dead, and you’re injured, and Papyrus is thankfully alive, but half her guard in Snowdin are dead. That realization hits her like a freight train.

Undyne has spent years imagining a human villian, but she never envisioned that the villian would look like you. The revelation that you have been living among monsters the entire time completely shatters her world. She’ll probably yell a lot, demanding answers. But as more details emerge, she grows quieter. Eventually, she reaches a point where she can’t really argue with what has happened. At the end of the day, you did what she would have done, for entirely different reasons and a lot sooner, but she understands that she would have killed that human, too.

What haunts her is the realization of how isolated you must have been all this time, human and alone, pretending, completely unlike the anime and manga.

The most likely to let the entire underground know what you are, wether she tries to capture you is based on your relationship with her, or maybe Gerson who would try to calm her down.

🦊 🦊 🦊 🦊 🦊

Ceroba already knew you were human the first time she saw your cloaked silohuette. Her relationship with Starlo and a lot of the Wild East was finally repaired, what would be the point in outing you if nobody else even realised what you were?

She's lost family and has witnessed the effects of desperation and grief on people. She understands why someone might make a choice they never intended to make. While others focus on the fact that you are human, Ceroba is preoccupied with the fact that you killed a child. It doesn't matter that the child was a monster, that they were a murderer, or that stopping them saved countless lives. She understands, and that’s exactly what disturbs her. She can see herself making the same decision under much more wrong and shameful circumstances.

Ceroba is one of the few people who doesn't try to reassure you. Instead, she lets you know you can take shelter in her home, that you can hide away, and she won't let a single guard through without letting you run first. When she learns that you intend to give the fallen human a proper burial, her opinion of you changes significantly. You still see a person, and that matters to her.

This is long post Clover, so she's begun hanging onto all her loved ones by her teeth so shell be damned if you killing one person is enough for her to abandon you

👑 👑 👑 👑 👑

The moment Asgore realizes you're human, everything and nothing changes at the same time. For decades, he has buried human children. For years, he has carried their souls. For years, he has watched the prison of the underground claim more victims. Now, another child is dead, and the one standing before him, human too, still alive.

Asgore immediately agrees that it deserves a burial, with no hesitation and no debate. Whatever was wrong with this, they were still a child, and Asgore has buried far too many of those already.

When you present the captured soul, he doesn’t celebrate or thank you. He simply looks older. The revelation that you’ve been hiding among monsters barely seems important compared to everything else. This was not for glory, revenge, or monsterkind’s future. This was done for a friend. For one moment of brief understanding and grief as you two seal the lid over the body together, you are neither human nor monster. You're just two people and a corpse.

Ironically, he becomes one of your strongest supporters. If anyone demands an investigation into you, Asgore quietly shuts them down. You’ve already suffered enough. You are proof that revenge has no place in the future of his people, and this child was proof that monsterkind is safer waiting a few more years before opening the barrier.

Asgore didnt let you live out of kindness. you understand without him needing to tell you. You are also afraid of what will happen after the barrier is broken and more monsters are made victims to humanity's blades.

⭐ ⭐ ⭐ ⭐ ⭐

Starlo initially views the entire situation as a legend. A mysterious vigilante that hunted down a killer human, defeated them and took them down, claimed their soul, and saved Snowdin turns out to be kin to the killer themselves. It sounded like something straight out of one of his classic Western stories. However, when he discovers that the monster is actually you and that you're human, the fantasy abruptly fades away.

Starlo has always admired fighters, but what he sees before him isn't a hero or a winner. It's someone who looks exhausted, someone who did something terrible because there were no other options. His respect for you grows immensely, but it’s a bittersweet kind of respect, the kind his mother raised him to hold for the old veterans born outside the underground.

He also becomes very protective. Anyone who tries to accuse you of being a threat quickly learns that Starlo has surprisingly strong opinions on the matter and can certainly be very threatening himself.

[merlinmarvelandother-oneshots]

undertale characters reacting to reader saying they don't think theyre good enough

romantic or platonic

gender neutral reader

includes: Toriel, Sans, Papyrus, Undyne, Mettaton, Asgore

Toriel:

-"where on earth did you get that idea?"

-hugs you

-tells you your biggest accomplishments, and how youve grown even in the short time shes known you

-"my life has been changed for the better since i've known you"

Sans:

-"who told ya that?"

-from then on tells you "good job" and other affirming words more often

-tells you "not true" whenever you say anything negative about yourself

Papyrus:

-"that is UNTRUE, for I, THE GREAT PAPYRUS, the embodiment of COOL, thinks you are MORE than good enough!"

-the next day comes back with a seven page list of EVERYTHING great about you

-it even goes into the tiniest of details

-like how your favorote colors is magificent!

Undyne:

-"WHAT?!?! WHO THE HELL TOLD YOU THAT!?"

-she is PISSED

-she prepared to beat whoever made you think that into a PULP

-but she pauses when you tell her that you told yourself

-then she gets quiet

-"thats just not true. and if you cant see that, then you bet your ass i'll make you see it!!"

-she affirms you SO aggressively

-"CMON, PUNK! YOU GOT THIS! DONT GIVE UP NOW, YA HEAR ME?"

Mettaton:

-"why, the underground doesn't seem to think so! my ratings have increased exponentially since you came onto the show!"

-little did you know... he was live.

-he had people call into the show to say nice things about you

Asgore:

-"would you like to tell me why you think that?"

-sits you down with a cup of tea to calm you down

-hes very patient

-he talks it through with you, to try to get to the root of the problem, so he can start making things better

-suggests starting therapy

[vikkirosko]

hi vikki! i hope that you are doing well ❤️ could i request an undyne from undertale with a female or gender neutral human reader? i would prefer headcanons, if thats okay with you ❤️

🗡 Undyne x human fem!Reader headcanons💥

Undyne never thought that she would start dating human. But after meeting you, she changed her mind. At first, you were just helping her settle in on the surface, but then your relationship started to change, first into friendship, and then into romance. For both of you, such a relationship was something new, and therefore you tried to figure everything out together and cope with the difficulties that stood in your way

She studied the new culture with great interest. Undyne only knew about humans thanks to Alphys, but most of this knowledge was very different from reality, because anime discs were the source of knowledge. When she first told you that she expected to see a large number of people with huge swords, you didn't know how to react. On the one hand, you didn't want to lie to her and tell her that such swords didn't exist in reality, but on the other hand, you didn't want to disappoint her, so you chose to let her find out the truth on her own. You wanted her to know as much as possible, so you tried as often as possible to invite her for walks to various places in the city where you lived

She liked helping you around the house. Undyne wanted to spend more time with you and therefore often offered you her help with cooking. You've heard that she taught Papyrus how to cook, so you were confident in her cooking skills. Until you really started cooking together. By the end of cooking dinner, your kitchen looked like a battlefield and your girlfriend was smiling broadly. Looking at her, you couldn't find the strength to be angry. You laughed, feeling surprisingly happy, despite the fact that you had to clean the kitchen after cooking for the next few hours

Although the other monsters had nothing against your relationship, there were humans who treated the fact that you and Undyne were dating as something bad. They were usually strangers who didn't even try to get to know you or Undyne better. They were just expressing their displeasure, but that didn't mean you were going to tolerate rudeness towards you. Undyne was ready to arrange a fight, but you intervened, explaining that you shouldn't solve everything with a battle. Instead, you coldly put the bullies in their place. Looking at you, Undyne couldn't help but smile with satisfaction. She liked to see how determined and serious you could become

Your relationship has never lost its energy. Undyne, who is loud and active, always found new things for you to do together, and you didn't mind keeping her company at all. You complemented each other and helped each other learn more about monsters and humans. Your lives have changed a lot, but looking at each other, you doubted that these changes were for the worse

[velvetria]

y/n inviting undyne and alphys for a hangout, 'forgetting' to tell them exactly what they're doing and where they're going.

so imagine undyne and alphys' surprise when y/n takes them out to a slap fight.

and also their shock to see y/n participating said slap fight, and winning. undyne screaming out in astonishment and yelling passive-aggressive encouragement. alphys thinking it's cool but also getting increasingly worried as it progresses

undyne recording and posting some vids on her private story/close friends and then all of sudden their phones are blowing up lmao

y/n after, cheek swollen: "y'all think i can go to work tomorrow?"

both of them: "i think ur calling out tmrrw that was sick"

-

i was watching a slap fight on youtube and started thinking 🙂‍↕️

smb write this

[system-network]

What if, now hear me out here, what if chat... Undyne, Alphys, reader, or whoever throuple. Remind me to think of an AU, but probably just the ogs5'0

OMG THE GIRLFRIEND'S!!!

OKAY UHHH

The dynamic of the three would be different based on your personality compared to their own personalities. (duh)

Undyne always gets aggressive with her lovers, like, nothing to hurt you or Alphys, but she gets soo excited to show off her girlfriends to others.

“Look at my sick girlfriends, yeah, TWO girlfriends!”

Alphys is overwhelmed with the thought of having more than one partner, hell- even one partner makes her nervous. What if she messed everything up? What if they don't like how she really is?

Her worries are immediately calmed by Undyne’s aggressive praise and your (slightly) calmer method of telling her that you love her no matter what!!

Long story short- You all love each other🫶

[garlickedbreadthe12th]

hey goat!1!1!!1 ur writing is awesome, i was wondering if you could do some undyne from undertale with a female significant other? just general dating headcanons, and maybe a lil lime/lemon while ur at it? but if not thats fine, either way write what you are comfortable with!! and remember to take care of urself 💗

Aw tysm!! This is such a cute idea

Undyne x Reader General Dating headcanons

Not used to romantic gestures, so when she flirts, it's awkward.

She loves you to pieces, even if she doesn't show it traditionally. She'll make you tea, or whatever food she makes that end up being edible in the mornings, and cooks dinner on the occasion.

There's not much use of pet names in public, Undyne's not the type of person who'd call you "honey", "princess" or "love". Most of the time, she'll call you a dork or nerd.

But in private, when it's just you two, she'll get all sweet on you. She holds you close, and treats you like a princess.

Some dates are practically royal guard training, or sports. It was kind of strange at first, and then you started to enjoy it.

On nicer dates, you two go to Grillby's or a restaurant out in the capital. Undyne knows a few good places around, and you usually don't know until you get there.

Undyne is, surprisingly, a very attentive lover. She knows nearly everything about you, and will make sure you're okay(Sometimes, in ways you don't even notice.)

If you're the type of person who watches anime or reads manga, she's all over it. Fighting anime is her favorite (Mainly JoJo's Bizarre Adventure), but she's grown fond of a few slice of life animes.

She's a skilled pianist, and will learn your favorite songs on piano just for you. She's taught you how to play a bit of piano, and she prides herself in that.

Whenever it's a nice night, you two go "star" watching, and talk together, maybe about old memories or lost friends.

----------------------------------------------------------------------

[j4mmedbugs]

Hiii! So um, I would love to check out your fics but it looks like you're only posting on your nsfw blog. I really want to support your work but I also don't want to cross your boundaries as I'm a minor who generally dislikes anything suggestive. Could you maybe reblog your sfw works on your main sfw account? I still have that blog blocked but I did check it rq to see if you were writing at all🥲 If you don't want to then it's perfectly fine! The pinned is a bit misleading is all😭

✦ YEAH FAIR I GET IT!! Most of my stuff is over THERE because everyone sending stuff to that inbox instead of this one 😭😭 I'll probably grab screenshots of the safe stuff & put em under the cut

✦ I genuinely do not intend for pinned to come off misleading!! Just that hardly anyone acknowledges that I'll also post stuff !! here !!! AKJJHDHJGDS 💔💔 I really appreciate your honesty tho anon and ty for respecting my boundaries :] hope you have a wonderful day/noon/night