Sans AU Headcanons

Reads 6,357
Votes 153
Parts 38
Time 14m

Reads 6,357
Votes 153
Parts 38
Time 14m

Mature

bluesans dreamsans dreamswap dreamswapnightmare dustsans errorsans fellsans hatesans headcanons killersans nightmaresans reapersans undertaleaus

My au headcanons for each character!
Each character and AU belongs to their creators!All Rights Reserved

bluesans dreamsans dreamswap dreamswapnightmare dustsans errorsans fellsans hatesans headcanons killersans nightmaresans reapersans undertaleaus

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38 parts

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'Can I Have A Say?' {AU Fanfic} by IcyWritesStuff

Color and Nightmare have been fighting over Killer for a long time, trying to get him to stay and switch sides over and over. But nobody has asked Killer how this makes him feel. Feeling all that pain, being reminded off his horrible past, and then getting it all torn away from and being forced to start over again. Killers soul has been at the peak of both redemption and pure insanity nonstop to the point where he can't even tell who he's meant to be anymore, and neither of his two 'allies' seem to notice it. All he can do is hope and serve, and maybe one day, make his decisions himself. {Credit to Artist!}

Dust trusts his fellow Bad Sanses with his life, but when he gets betrayed he leaves the Bad Sanses and hides in the Omega Timeline. Dream and Cross do the best they can to help Dust, but Dust has vowed to never trust anyone ever again. This is based on the Rusttale multiverse so things may be slightly different than you expect.

Nightmare, who has been dead for the last century, stumbles across a dying Sans in a destroyed au and takes him under his wing. Er, tentacles. From there, they start a band of rejects to get revenge on his brother. Sadly, said brother has other plans for them. That wont stop the shakily made team from bonding and having fun though! (AU where Killer is the leader of the 'Bad Sanses'. I own pretty much none of the characters)

cover art isn't mine and belongs to its rightful owner Error is finally ready to give in. The multiverse he spent so many eons protecting and keeping the balance is rebelling against him. The AUs he has spent so long protecting are rebelling and are soon to be destroyed, but worst of all, all of the Sanses hate him for some reason. And I mean ALL. Why should he continue? There's nothing to live for anymore. Not even his family can help with this. Or, the people he thought to be his family.

Sanscest One-Shots (old) by NoneSoupForYou

This is a bunch of Undertale one-shots. And a bunch of Undertale and Undertale AU ships. Most of these ideas I wanted for books but, don't have enough time nor ideas. The cover isn't mine. Also, all of the characters aren't mine. I'm just giving them the credit even if I don't know all of the creators of the characters.

Brotherly Trouble [COMPLETE ✔] by tRaSh_4U

After Dream falls into the darkness, they then team up with there brother in some trouble. Destroying multiverse but Nightmare realized that he only want to be with his brother. While Ink, Blue, Fell, Cross, and Sans want there friend Dream back as Shattered destroys everything they love. Has Reached #1 In ShatteredDream

Wounds Heal, Scars Fade by TheVoidIsMyHome

The idea I created that spawned this book idea: Story idea: FGOD Book centered around "Wounds Heal, Scars Fade" with some sort of fun naming scheme. The plot is that finally some dumb dumb checks Error's soul, and the truth is revealed. But things aren't so simple. This FGOD Error is hated by everyone and tormented by everyone, so he doesn't have Geno, Fresh, Blue, or the bad Sanses. Cause they all are either hateful, spiteful, or neutral towards him. So as the Sanses try to heal Error's wounds, his scars rear their ugly heads. You can decide if he jumps anyways despite being understood and taken care of, and how many times/how many multiverses he jumps through before finding a place where his scars begin to fade. (This place is up to you, but the only requirement is it has to be reasonably/functionally different from the main world he came from. So all the other Sanses have to look drastically different, or behave differently enough that the looks don't matter.) You are free to harness that idea for yourself if you like, just credit me. (If it is not obvious, this will be an angsty book, and my storyline for Error's journey will be different than yours.)

HP (Dust x Goddess Child Reader) by SpiritWolfNura

Dust HATES humans. Dust barely LIKES anyone. When the Bad Sanses are forced to guard a young goddess, Dust gets stuck alone with the child.

"Hm?" Timer asks taking his wrist watch off, checking the time before taking out a screwdriver and pulling it apart. Nervous habit of his. The meeting between the multi-universes continue with Timer as a side character. Hes never been the best at handling so much attention yet.. here he is, one of the Sans AUs. The most powerful monsters in the Multiverse. "Hey Timer!" A gruff voice calls. "Huh?" Timer looks up to see the main Sanses looking at him. "Yes?" He asks, all the bolts and cogs of his watch were spread out on the floor before him. "Ink asked you something! You're expected to answer!" "My apologies Dust." Timer says "What was your question, Ink?" "No prob. I asked how many resets you've had. We don't know much about your au. Maybe I should visit it one time!" Resets.. we don't talk about resets in ClockTale..

Murderous lovers dust sans x reader by YURI_YUTO

You are a cold killer. Being childhood friends with ink cause you b8th were failed experiments and left with no souls. You killed your parents cause they hated you and you killed everyone in your au and did mutliple genocide routes just stop the human from killing you and your papyrus. But your papyrus stayed in the broken au cause he hated the new you. Then you joined the bad sanses and your work partner is dust sans. At first you didnt like the looks of him but then you reliase that he is the same as you. Did multiple genocide routes just to stop his frisk and now you guys keep on getting closer to the point you guys fell in love with each other and nightmare didnt approve of it at all.

[DISCONTINUED] Undertale AUs x reader by SENIZISE

Just some Undertale and AUs x reader for funsies <3 Happy 2025!!

Under rewrite [lore] [evil lux au] by LilyLunaetic

Welcome to the lore of [E.L.A]

Inktober but it's written stuffs by NoneSoupForYou

It's a little thing of written stuff about Undertale and it's aus. Some for a day might be short and others might be longer. It'll have angst and fluff or just complete chaos. It'll also switch from human to skeleton, just a heads up there. Also the prompts are made up by me so..yeah. Anyway, hope y'all enjoy this!

Reborn [Error!Sans fanfic] [Fgod] by ERROR_F4N_FR34K

[Cover belongs to me] Error is the (forced) god of destruction, Ink is the god of creation. Both are needed to keep the balance, but while one is loved the other is hated. Ink together with the judges elaborated a plan to finally stop Error. A deadly trap. Impossible to escape even for the feared destroyer. But someone is not following the plan. Things get out of control. Error gets out of control. Although things don't go exactly as planed, and the results are more chaotic than they should. It still worked. Error was finally gone. Lost into the VOID, scattering across time and space. But someone had their eyes on the broken destroyer for a long time, and they were waiting for this moment. Now they can finally act. And take care of their chosen child. ... Error woke up at the sound of his own crying. What? What's this sound? Why can't he speak? Wait, where is he? Why can't he get up? ...Uh? Why is he... so small? ...what happened to him? _________________________________ - Error!Sans is a variant of the character Sans from the game Undertale. Error!Sans was created by LoverofPiggies aka CrayonQueen - This story is inspired by 'Healing what has been broken' by harrish6. Although it happens in a different way, Error will still fall into the VOID. But instead of just falling into a different Multiverse something else happens. - fgod Error concept belongs to @harrish6 - Undertale belongs to Toby Fox Mar 10, 2020

Nightmare had been so kind. He'd said all the right things and done everything perfectly to gain Dream's trust. When had the proposition turned from the possibility of trust to the promise of power? I do not own these characters!

Sans Aus in a school what could go wrong? Lots of things, do people die? I don't know, but ships are included. You could say it is a slow burn kinda thing or it went pretty quick, but chaos ensues and it isn't my fault. (FandomError)

Did you know multiverse resets exist? Well they do, and Error is pretty sure they don't cause this much change. This isn't his multiverse. Not anymore. {This is the old version of the story, another one is being made.}

This life as Error Sans. by coolkidindahood

⪼A life where our beloved [Reader/REDACTED] died a very.. 'Fun' death. ⪼upon realizing their death, they'd realize that they reincarnated into error sans, a character they used to know as a kid. ⪼[REDACTED] Gained some friends that were on his side along the way, siding with the bad side of the AU's proudly. ⪼would [REDACTED] find out new things, new people, and keep up with their act? ⪼("SkReW yOu gOd!!1!".... huh?) ____________________________ ⚠︎{This story was made as a joke at first, the writing improves as time goes on. This story also contains swear words, No ships, And some grammar mistakes}⚠︎ ⪼(Cover made by me.) ____________________________ ⪼23/1/24 - #1 in Ink ⪼23/1/24 - #1 in Balance ⪼23/1/24 - #1 in Noships ⪼25/2/24 - #1 in Dreamsans ≫08/3/24 - #1 in Multiverse ⪼18/3/24 - #1 in Ausanses ≫29/3/24 - #1 in Inksans ≫30/3/24 - #1 in Undertale ≫03/4/24 - #1 in Reader ≫17/5/24 - #1 in Underverse ⪼24/6/24 - #1 in ErrorSans

CRIMINAL AMNESIAC by MissUnpopularOpinion

When Dream loses his memories after receiving severe head trauma in battle, Nightmare and his team choose to take advantage of the situation...

Mama Nootmare (A fanfic with the bad sanses) by Ravenpoint

A fanfic/story of Nightmare and children bad guys! All of the bad guys are children excluding Nightmare and Error. This is a story of Nightmare being a parent. I am terrible at stories so this may be terrible. I own none of the art or characters.

'Can I Have A Say?' {AU Fanfic}

Color and Nightmare have been fighting over Killer for a long time, trying to get him to stay and switch sides over and over. But nobody has asked Killer how this makes him feel. Feeling all that pain, being reminded off his horrible past, and then getting it all torn away from and being forced to start over again. Killers soul has been at the peak of both redemption and pure insanity nonstop to the point where he can't even tell who he's meant to be anymore, and neither of his two 'allies' seem to notice it. All he can do is hope and serve, and maybe one day, make his decisions himself. {Credit to Artist!}

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