#Reader X Undertale | Explore Tumblr posts and blogs

unknownzapy · 2 years ago

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Author’s Note: I do not support nor condone the actions mentioned in this piece of writing and should stay purely in fiction. This prompt is for entertainment use only. If I missed any triggering topic, please tell me.

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Triggers with Red Bold are especially detailed in these Head-Canons. Viewer discretion is advised.

Trigger/Content Warnings:

Murder

Suicide

Gaslighting

Mental Abuse

Mass Extinction

7 Stages of Grief

Mental Breakdowns

Gatekeeping Trauma

Symptoms of Amnesia

Symptoms of Paranoia

Symptoms of Depression

Declining Mental Health

Implied use of Dark Humor

Declining Physical Health

Symptoms of Stockholm Syndrome

Symptoms of Derealization Disorder

Prompt: Sans The Skeleton (Undertale) with a Gender Neutral Reader who is the Player that did the Genocide Route. This could go either Romantic or Platonic.

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Sans, as a whole, finds you disgusting and revolting in all ways possible. As much as he doesn’t remember every single detail about whatever route you chose and restarted all over again, specifically Genocide in this case, all he knows is that he’s going off on what he can remember. This includes hunches and “bad feelings” when he’s close, or in the same area, with you.

The second time you open up a new game file after a RESET, Sans immediately can’t keep his eyes away from you and keep his distance. The air around you feels familiar, yet so ominous; whenever you come near, he instinctively backs away from you. He’s fairly apprehensive about you, but at the same time willing to talk to you if you hadn’t killed anyone…yet. If you did, he’ll probably tell you that it was out of self defense and make a snarky comment or joke towards you and not the monster.

Anyways, Sans catches on fairly quickly about your behavior. You want to harm/kill monsters, but you just can’t. You want to achieve a True Reset out of guilt, out of curiosity, out of boredom, whatever it is that fills you with, well, DETERMINATION. Whatever it is, The Skeleton has this weird feeling that, once you set free Monsterkind, you’ll destroy their hopes and dreams at their most vulnerable. Including his.

Majority of the time, he knows he can’t do a damn thing about you RESETing over and over again for whatever reason, but at the same time, a piece of him says that you’ll give him and everyone else a real, genuine happy ending. However, and let’s all be real here, Sans is already getting delusional about it.

The very moment you actually do a Genocide route for a second time though, Sans strangely puts his absolute all into the fight when you eventually come to Judgment Hall. He was skeptical about you at first, but took his chance at being patient. Weirdly enough, his attacks were more rough, more wild, less accurate, less within the code…that’s when it clicked. Sans slowly, but surely deviates from his usual laid back and lazy self to a shunned, hard working monster who wants answers. He jumps from blueprints and experiments to theories, lack of severe sleep, and living off of caffeinated coffee.

He doesn’t know why of all sudden he cares so much about you slaughtering everyone, despite claiming he “didn’t care anymore about what happens next.” Call it survival instinct or fight or flight, Sans is going with it to save himself from you, or whatever “allies” you have, but he tries not to dwell on that too much.

Throughout his search of trying to figure you out, his friends grow increasingly worried for him, especially. However, as much as they are worried, Sans brushes it off as “nothing to worry about” and cracks puns about his situation to loosen everyone up.

“I used to be able to pull all-nighters but now I can barely pull all-dayers.”

“People in sleeping bags are the soft tacos of the bear world.”

“I sleep with a knife under my pillow. You never know when someone is going to break in and give you a cake.”

Along with his sanity, Sans’ puns become increasingly deteriorating to questionable to outright concerning. Sure, he does care about the other monsters’ well-being as well, but he’ll give them tough love every once in a while, followed by a wink and a “self aware” hint, letting them do whatever they want with that information.

“I know I’ve been working harder than I usually would, but I wanted to make a change for once and take my little bros advice. Plus, Paps wouldn’t stop complaining ‘bout my sock pile. Anyways, don’tcha have a dinner date to go to?”

With decreased sleep now slapped onto him, Sans is quite dismissive about his attitude to the point where people either get annoyed or leave him alone, both knowing that Sans is better than this. All it takes is time, and as patient as he is, sometimes he wishes that you would RESET and make them forget about his changing behaviors. But you don’t. Knowing you, you want to see the end results about him as much as he does about you. But at the same time, his patience becomes thinner and thinner the more his fellow monsters beg and plead for him to know what’s wrong and offer to help him whatever’s bothering him.

…But he can’t. Sans knows he can’t reveal the truth. Even if he did, no one would believe him except a certain flower. Speaking of which, Sans did try speaking with other boss monsters about his particular predicament. Toriel was overwhelmed with grief and shock, Undyne was pissed more than ever and took her anger out on him verbally and physically, Asgore was more understanding because he knew how many times you’ve died before but still couldn’t comprehend you as a whole different person entirely, Papyrus is out of the question since Sans knows he couldn’t handle the same burden that he bears (plus he couldn’t see Pap dying again, even if it is fruitless anyway), and Mettaton is…well, Mettaton would most likely glorify the situation in hopes of having a better life in the underground and degrade you, the Player’s (and Frisk’s), existence.

Then there’s Alphys. I feel like both of these characters are in the same situation, whereas Sans’ story is hundred times worse than Alphys’. Alphys is to True Lab as much as Sans is to The Player, which makes them click instantly, even if the given circumstances aren’t entirely ideal. Sans being Sans, Alphys unlocked a new sense of humor for coping with hiding with the True Lab (and yes, she shared her secret after reluctantly hearing about Sans’ story since they share an interest in science. I feel like they’ll have a mutual understanding and friendship for each other afterwards).

The two go back and force with the darkest of jokes, morbid of puns, the list goes on. Though, it could only last for so long before something happens. That “something” being the suicide of Alphys. Sans would become shocked, albeit knowing it would happen eventually, deep down inside. Alphys did take it better than the others, although in an extremely toxic form.

Maybe it was his fault that Alphys died, only going towards her for personal comfort instead of genuine thought. At first, Sans was shocked at her suicide, surprisingly the only person to know about her death, excluding you. He wanted to take proper vengeance for her, but considering everything, it would be in vain but to continue living for her sake, chipping his mentality away more and more as he did so. After that very moment, the monster began to deny the very existence of you. Then His peers. Then His friends. His brother, too. Even himself.

Sans abruptly stops his little investigation about you and throws it all away, finding it all useless, considering you’ll just RESET all over again which will take him back to square one. He bottles all these intense emotions under wraps until he absolutely shatters, breaking down into heated tears of both hatred and anger and deep depression with him flinching at the slightest of movement from anyone around him. All happiness and dedication of surviving is now dissolved into guilt, rage, and paranoia.

Sans doesn’t have any reason to be alive anymore. Not if you’re still here, anyway. Even if you do “leave” after everything, after being “curious” enough, the after effects you made and mental scars you leave on him is immeasurable. He gaslights himself that he didn’t go through that kind of trauma, he gaslights himself that you never existed, he even gaslights himself that he’s perfectly “normal” and everything around him is “real as he can understand.”

Sans, after departure, still clings to you like a parasite, sadly. You’re the only thing that can control this timeline of his. He needs you. Your laws and actions are basically law to him now, even if it is worst case scenario. You’re more real than anything else to him.

He tries to fill this void in him, which is completely linked to instinct and survival. By doing so, he oftentimes takes from or harm others, unintentionally speaking, due to his utter lack of self control that comes with his desperation to feel “whole” again.

There are things that we need in life, and then things that we simply want. And with you, there’s no real line to that, which is why his lack of self control for living is so dangerous. If he feels like he needs something more than someone else wants something, then there’s a good chance he’s not going to back down. What it really is, rather than just a need to survive, it’s a need to live and experience the things around him, unironically speaking.

As fucked up as it is, Sans is devoid of his former self, a husk of twisted humor and unhinged mentality who would do anything to survive, even if it costs him to live off of the most dangerous creatures around him. All it takes is time to ease his way towards appreciating you a little more, right?