What Lies Inside (Gaster!Sans x Reader ) - JAE <3 - Wattpad

Story cover for What Lies Inside (Gaster!Sans x Reader ) by Jaethefallenhuman

What Lies Inside (Gaster!Sans x Reader )

Jaethefallenhuman

Reads 99,579
Votes 4,008
Parts 42
Time 2h 29m

Reads 99,579
Votes 4,008
Parts 42
Time 2h 29m

Jaethefallenhuman

Mature

alphys asriel fanfiction flowey fluff gaster gasterpapyrus gastersans gastersansxreader gastertale gsans lemon papyrus sans toriel undertale undyne xreader

"You know sweetheart, lying doesn't get you anywhere with me." He said lighting a cigarette and placing it in between his teeth. Vanilla, leather, and smoke is quite the intoxicating smell. 

"I'm not lying, also who gives you the right to judge if I'm lying or not?" Something flickers inside me, a warm burning feeling that fuels my anger with this asshole. 

Walking up closer to me he pins me against the wall, smoke dances around his skull in a vary of swirls and curves. "Let's get something straight dove, I am your worst nightmare and I am your best daydream. I can see right through people, ironic right? There's something about you, I know you're hiding something inside." 

He really is good at seeing through people, but the thing is I'm not like anybody else. 

The media I use in this book does not belong to me, they belong to their rightful owners!
Gastersans is NOT my original character ! He was created by Borurou
Undertale was created by Toby Fox

Highest rankings 
#1 Gatersansxreader 
#1 Gastertale
#19 GastersansAll Rights Reserved

alphys asriel fanfiction flowey fluff gaster gasterpapyrus gastersans gastersansxreader gastertale gsans lemon papyrus sans toriel undertale undyne xreader

Table of contents

42 parts

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[HIATUS] Don't Forget [Sans x Female Reader] by GabrielXander

You would think that with how shit your luck is, you would've been dead day one since falling into the Underground filled with scary monsters and a few spooky skeletons. However, much to your surprise, that did not happen (yet). You know how you ended up here, but you don't know... HOW. You're actually in the GAME Undertale now. And to make matters worse, there are some people who KNOW. You're surviving the best you can, but things are only going to get weirder from here on out. Gaster apparently needs your help? You're using the DJ to go to different AU's? You are gay now?- Okay, maybe that last one is just a joke, but still! You can only hope that your instincts are enough to keep you alive in these trenches. On God, they tryin' to drown you in this hoe! {Available on Patreon, Quotev, and Ao3 under GabrielXander}

Love can't tear us apart... Right?[On Hold] by bonecatAndcompany

(cover draw by me. It's just a version from an inspiration I saw from another artist that I forgot their name by the way-) read this story if you like a Canon character being ship by my persona. I mean for me it's better than doing an x reader XD I'm so bad at those(I don't even understand how people loved my Huggy wuggy one-). anyway enjoy. Gaster belong to Toby fox. the other characters from Undertale has well. only my ocs and persona belong to me. So has the drawing you will see in it. if I even remember to put some in ^^"

Undertale X Reader [In Remake] by Cat_Maipie

Let's get to the point shall we? So let's look at the list here... You're a... no information? Hm, interesting i guess, I'll have to base it off my observation. Whatever, you're a human, well kind of. You're a human and a monster at the same time, more like in between. Let's say... player? Better than nothing i guess. You're your own person. Sometimes you control frisk, sometimes you don't. You can also move through timelines, and also universes but that may be too risky huh? You'll find more about it soon... THIS CONTAINS VIOLENCE PLEASE BE WARNED! Lemons? Maybe. - #57 in sans 12/14/25 - #1 in floweyxreader 01/10/25 *** COVER : Credits to the person who made it GAME : Toby Fox

[Sansxreader] A Whole New World *UNDERREVISION* by Mousington

UNDER REVISION (Check out Memories!) BTW- Sans is human in this. The story will explain. He has a sister named Chelsea and he is your "cousin".This story contains legal age drinking, a hint of suicide and might have a lemon if I decide to write one. Idek (Future me here, fyi- I'm not writing a lemon EVER in my defense I didn't know what they were but my friend said to put that soooo....) [^well variety IS the spice of life soooo };) I might...] ENJOY

The Faults in Our Souls ~ Gaster x Reader (Under editing) by _T3chn0_

"Do you not want to go back home? To the surface?" °°°°°°°°°°°°°°°° "No." °°°°°°°°°°°°°°°° "Why?" °°°°°°°°°°°°°°°° "Because my home is right here, sitting next to me." _______________________ You were used to the unfortunates of life. Everyone had them, it was normal, but life decided to take a lemon, freeze it, then throw it at your face. But, it wasn't like it was THAT bad... Until you fell into the Underground that'd been sealed for over a hundred years, of course. Friends along the way help you through the sudden changes in your life, and a bone-ified family as well. (82,110 words) (Undertale does not belong to me, only the characters I added for plot reasonings. You belong to yourself, of course.)

Murder in the Alley [ Dusttale!Sans x Reader ] by morrow-

He killed them all. Dust, down the waters of the the forest it runs, through the veins of the skeletons and the demons that prowl the night. It's the silent enemy, the adversary that slowly chokes and brings down entire armies to their knees. None can oppose it for none have the will or the strength. And it is the dust that emerges from the mouth of a mountain that overlooks a city, the dust that creeps and crawls through the forest and down the alleyways. It is the dust that wraps its bony hands around the throats of the damned ignorant enough to walk the streets, squeezing until the last heartbeat thrums. You are a detective in this city, a quaint area with little crime and a police force hopped up on Dunkin Donuts. But when a string of murders plagues the town, you are thrown on the case following cold leads and an ominous trail of dust. But one night, when you catch wind of a scream and follow it through the dark, you find a skeleton and the rest is history.

Fallen Angel (Gaster x reader) OLD by Feniksiara

OLD AND BADLY WRITTEN THE REWRITE IS POSTED ALREADY DISCLAIMER: The god figure created in this fanfic is purely fictional. He is purposefully made to be prideful and cruel and is not supposed to represent any god. I am religious myself and I did not intend to attack anyones believes with this book. An angel. Sign of hope for humans, yet a nightmare for monsters. Powerful, skilled and...beautiful. But what happens when one rebels against the cruelty towards monsters? What happens when she's banished to the underground, only with wings as a painful reminder of who she once was. What if she's found by the Royal Scientist? What if the nightmare every monster is scared about, is just as broken as they are? And what if she'd find something she would never imagine she'd find in the underground...love? *Cover edited by me. The pictures used in the story belong to their original creators. If any of them aren't okay with them being used, I'll take them down* Started: 21.12.2018 Ended: 22.08.2021 09.03.2019-Number 1 in gaster! 07.02.2020- Number 7 in undertale! 25.02.2020- Number 4 in undertale! 15.04.2020- Number 1 in undertale! 11.10.2020- Number 1 in papyrus! 03.06.2021- Number 80 in fanfiction!

Bravotale by KCJoannaPlays

Undertale belongs to Toby Fox but my AU Bravotale belongs to me. So we start our journey through the underground with a human named Frisk as they traverse the underground they seem to feel like they are always being watched by someone or something because whenever they turn around all they see is a flash of red in the corner or there eye and after that nothing is there but they feel that whoever it is is going to always be watching them, who is it you may wonder Welp just read and find out And that my dear readers is a summary of how everything is the same yet different in the underground.

Rising Storm [ Ink!Sans x Reader ] by morrow-

free·dom (ˈfrēdəm) noun the power or right to act, speak, or think as one wants without hindrance or restraint. Freedom. It's a luxury that few can afford, not after the Great War that ravaged the multiverse and brought entire armies to its knees, eradicating any opposition or those that dare oppose. They call themselves the Shadow, the Dark Brotherhood, they go by many names. A group of mysterious unnamed figureheads govern the multiverse without mercy, sowing terror wherever they please. Ink, the known guardian and protector of the multiverse, has been eradicated from memory and presumed dead. And it's what you believe, a small, unimportant person tucked away in an unimportant universe with an unimportant name. There is no hope, only chaos and suffering flourish in this new age. But when a mysterious message plagues your dreams, a small beacon of hope emerges. You embark on a journey and leave everything you've ever known or loved behind, not that there was much, anyway. Sought at every twist and turn, your once-quiet life evolves into one much more dangerous, and it soon becomes obvious that there are greater forces at work. But the message in your dreams never ceases and there's one thing that you're certain. Ink is alive, and they will stop at nothing to make sure the hope dies with you.

Universal Surface Angel by Lithriel

Reader insert. What if W.D Gaster didn't just get split between time and space, but actually ended up in your world in an abandoned hospital you called home? Your were a young child he decided to use as experiments to test human determination in said world and breaks physical laws to test human possibility? He knows of the powers you gained from his experiments... all but one, this one allows you to tear realities just enough to teleport into them. Knowing of Undertale you felt bad for the monsters stuck below in their world and wish to help them, but something goes wrong and you end up going to certain AUs and helping them, gaining the attention of some bad skeletons who now desire your power for them-selfish-selfs.

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Slide 1 of 10

[HIATUS] Don't Forget [Sans x Female Reader] cover

Love can't tear us apart... Right?[On Hold] cover

Undertale X Reader [In Remake] cover

[Sansxreader] A Whole New World *UNDERREVISION* cover

The Faults in Our Souls ~ Gaster x Reader (Under editing) cover

Murder in the Alley [ Dusttale!Sans x Reader ] cover

Fallen Angel (Gaster x reader) OLD cover

Bravotale cover

Rising Storm [ Ink!Sans x Reader ] cover

Universal Surface Angel cover

[HIATUS] Don't Forget [Sans x Female Reader]

You would think that with how shit your luck is, you would've been dead day one since falling into the Underground filled with scary monsters and a few spooky skeletons. However, much to your surprise, that did not happen (yet). You know how you ended up here, but you don't know... HOW. You're actually in the GAME Undertale now. And to make matters worse, there are some people who KNOW. You're surviving the best you can, but things are only going to get weirder from here on out. Gaster apparently needs your help? You're using the DJ to go to different AU's? You are gay now?- Okay, maybe that last one is just a joke, but still! You can only hope that your instincts are enough to keep you alive in these trenches. On God, they tryin' to drown you in this hoe! {Available on Patreon, Quotev, and Ao3 under GabrielXander}