Gaster x Reader

Gaster x Reader

159,955 4,247 61

Pretty self explanatory. This takes place after the Pacifist route in Undertale. Through determination, Frisk was able to bring back Chara, Asriel (Asriel is Flowey per say), and Gaster. I believe that Gaster is the father of Sans and Papyrus. I also don't believe that Chara is evil. The monsters are on the surface, and although they are amongst humans, most humans have accepted them.…

To Hell and Back (Gaster x Reader)

To Hell and Back (Gaster x Reader)

12,930 711 35

"What's that look for? Are you perhaps unhappy to see me?""Oh no. Oh no, quite the contrary, my love. I've craved to be with you for the longest time"*****You were sure that you would have captured a Monster, at all costs. But were you sure that you would have captured not a Monster's body, but a Monster's heart?*****The Barrier is broken•Frisk has saved the Monsters•But not all things went according to plan..........It is renowned that Frisk fell into the Underground. They spared everyone, they had [Mercy] for everyone. In the end, they have chosen to be an ambassador for monsters, to represent them in front of all the other humans.Frisk was full of [Mercy].But the humans weren't as merciful as them.Humans completely forgot about Monsters, and now they had to deal with what they considered an ancient enemy, despite the Monsters' friendly intentions.What will Monsters do, if they suddenly are persecuted by Humans? Will they seek help? Will they search for old friends?...Was it reality? Or was it a true living Hell?Things always went according to plan, so why? This time, why did it have to end like this?You are a spy, working for the most powerful secret Organisation of the Human Government. Your job is to find your targets and bring them back at the Organisation, but if you have the order to, then you have to kill them.This time however...you underestimated the enemy.*****The new plan was quite simple: bringing him back in exchange for your freedom.Falling in love with him was not part of the deal though.*********Word count: 110.473Cover by Earth Garden on tumblr!!…

Gaster x Reader- Not Your Fault

Gaster x Reader- Not Your Fault

106,779 3,356 13

You're a human who has fallen down into the underground. There you meet a certain skeletal scientist and his sons. Will you get close to the family or will you become their enemy.Loosely based on TheBombDiggity666 Dadster comics (which you should totally check out if you haven't already) and occurs before frisk's appearance.Also artwork is not mine~…

The Ghost Above Me (Gaster x Reader)

The Ghost Above Me (Gaster x Reader)

45,928 1,751 33

Even though the Underground is now empty, except for some people, you still stupidly managed to fall in the once prison for monsters.Who knew you would get away from the prison with someone following you behind your back?Who would have known an echo flower would have revealed too many things?Who would have known you'd fall in love again?Words count: 55.608…

Gaster One Shots 3

Gaster One Shots 3

232,019 7,896 200

THIRD TIME IS THE CHARM![Highest ranking #98 in fanfic]NO IMAGES R MINE…

Light in the Dark (Gaster X Reader)

Light in the Dark (Gaster X Reader)

10,026 457 16

He went blind in a freak accident at the lab. Now all he 'sees' is darkness. Until.. he meets you.…

We Speak In Hands (Gaster x Female!Reader)

We Speak In Hands (Gaster x Female!Reader)

43,252 2,305 33

Gaster is the current royal scientist, set with a mission to break the barrier and free monster-kind from their underground prison. His loyalty and persistence to the task is clear, since he'll make whatever sacrifice necessary to complete it. However, even a perfectionist can be blind to some of their own flaws. Gaster has a habit of pushing things or himself too far. An accident occurs in the lab. Whilst trying to save him; one of his lab assistants, Y/N, gets injured. Burdening himself with even more pressure and guilt to fix it, Gaster thinks that doing all of her work for her will cover up the incident. Still, the sad reality is that the damage can't be undone. Well, Gaster ends up spending more and more time with her. As a result, both of them gain an entirely new perspective of the other, they aren't just another monster in a lab coat anymore.Hey! It's Oreo aka Writer~San! Undertale, it's characters, and it's fanart do not belong to me. However, the story does!!! I hope you enjoy it! (^w^)~…

SOULs {Fem! W.D Gaster X Male! Reader}

SOULs {Fem! W.D Gaster X Male! Reader}

64,711 1,023 11

You are the elder brother of Frisk. I'll explain later.This book will not be updated for a while, sorry.Completed: December 2nd, 2020SC Book# 12…

Darkness' Eternal Bride (Gaster x Reader)

Darkness' Eternal Bride (Gaster x Reader)

27,868 1,082 34

WARNING: THIS CONTAINS HIGHLY MATURE CONTENT (BLOOD, VIOLENCE) READ AT YOUR OWN RISKMoney can change a lot of things.It can even change your destiny.Plunge yourself into a life of romance, science, disappearance and misunderstanding.________________"When you get better, I'd like to kiss you"...Gaster only wanted to conduct an experiment. He surely didn't want his life to be taken over by weird feelings.He also wanted the only thing he couldn't really have.He wanted you.What will he obtain? Will his research finally be completed? Or will he have to start another one?As for you, will you be able to move on from the past?Words count: 81.390Also contains mentions of nsfw [Rankings: #1 in #gaster (08/21/2022), #5 in #xreader (08/21/2022)]…

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

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

43,835 1,529 28

"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.)…

W. D. Gaster - An Undertale Story

W. D. Gaster - An Undertale Story

5,932 285 35

It all started when W. D. Gaster became the Royal Scientist of the Underground. Many monsters knew him, some even followed him. But one day, he injected himself with DETERMINATION. It caused something bad to happen. But it all took a turn for the worst when he fell into his creation. When he fell into the CORE. When he found out the truth. When he drifted in the darkness. Forever.Undertale Characters and Undertale by Toby FoxCover Art by me.…

Gaster OneShots 4

Gaster OneShots 4

191,962 5,438 199

THAT'S RIGHT! #4!!!(No images r mine)DEAL WITH IT!…

Gaster!sans x reader

Gaster!sans x reader

6,611 89 7

so yeah hope you enjoy this this is my second fan fic.…

Meeting Walker Duncan Gaster

Meeting Walker Duncan Gaster

2,479 306 32

What if when Gaster fell into the C.O.R.E, instead of ending up in the Void, he was transported to a different universe were magic doesn't exist and he is turned into a creature he hates the most?…

Scientist - GASTER X READER

Scientist - GASTER X READER

149,155 4,258 19

Hi guys! So this is actually my first time writing a adventure story (and xReader), so I am kind of sorry if it looks crappy!!******A long time ago, people were missing when they climb up Mount Ebott. They say there was magic, got lost, or even died. But when you discover the secrets of the mountain, you will get attached to it, and even maybe meet a new 'friend'...||an W.D. Gaster x Reader fanfic||•I do NOT own any type of artwork that is included here in the fanfic, all art goes to thier respective owners.•…

Fallen Angel (Gaster x reader) OLD

Fallen Angel (Gaster x reader) OLD

148,769 6,065 49

OLD AND BADLY WRITTEN THE REWRITE IS POSTED ALREADYDISCLAIMER: 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: 21.12.2018Ended: 22.08.202109.03.2019-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!…

Gaster x Grillby (Grillster)

Gaster x Grillby (Grillster)

54,747 1,190 38

The art in this story isn't mine (if i feature my own art i'll say low chance i will seeing I can't draw grillbys head) This is story happens before Gaster falls, but they are in the undergrounds and also after gaster fallsA GRILLSTER ONE SHOT BOOK NOWREQUESTS OPENAll characters and game belong to TobyFox.…

Meeting WD Gaster

Meeting WD Gaster

6,094 151 4

Reader meets WD Gaster. Takes place before the monsters are freed from Underground. Enjoy.…

Gaster Sans Is The Dad

Gaster Sans Is The Dad

6,756 198 5

(Completed.) Yup. Gaster Sans is now the proud father of all of the other AU Sanses (other than Echofell Gaster Sans). This is his life as a father. Also the Sanses don't think that they're related, and they aren't. So Sanscest. Mep.None of the pictures used are mine.Contains censored f*cking swearing…

{Broken Already} Gaster Sans x Reader

{Broken Already} Gaster Sans x Reader

122,878 3,769 25

"That's how I ended up here.""Seems bad.""Oh no, it was hell."…