Gasterxreader Stories

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^)~

You've always have had a creepy smile, and it doesn't help that you have these scars on your face now.... It doesn't matter though, you're fine with it, and he's happy too... Simple Gaster X Reader fic, I hope everyone enjoys!

A mountain were kids go and never come back. Kids grow up knowing never to clime it. But the same mountain that's promise death promises rest and hope for others.

(Cover art by Tumblr user rorischach) Tw for mentions of medical settings and tools, as well as possible death and light gore. Nonbinary Gaster (he/they), I will die on this hill. Gender neutral pronouns for the reader as well! Also loosely theming it around Rät by Penelope Scott Enjoy <3

Author's note: Brrrr this is my first ever fanfic I've ever made sksksk and for the first time, the reason for this is bc I got an idea for Gaster X reader fanfic! I guess I got inspired by other Gaster X reader fanfics or then it's (was) just an alternative version of my OC Thiara (whose a skeleton) "arrive" to the underground rather than canonically/officially being already in there, don't know! it can be both^^ But my god- I'm a bit scared tho lol since I've never done this before, I don't really want to make the characters wrong or something (might be off-character idk),,, But uh- yea, read below for the story description now,, -- (Y/N) is a skeleton who weren't trapped underground like the rest of the monsters when barrier was casted, but instead hid with her/his/their mother and her/his/their twin, but were one day found and captured.. or at least (Y/N) was. Their family wanted to rescue them, they all managed to run to the mountain where the barrier was casted, but the humans had catched up, only (Y/N) was able to get through the barrier to safety.. or rather pushed in as their rest of the family was killed. From there (Y/N) was found by queen Toriel and were taken for better healing to a certain royal scientist; W.D.Gaster! The story continues on..... -- All the Undertale characters belongs to Toby Fox!!! Reader belongs to you^^ I might give out some additional OCs or not, depends! Now babai~ Edit: I'll be using they/them pronounces for the reader-- might've forgotten to mention it before publishing anything,,,

It's been a few years since monsters had poured out from Mount Ebott unexpectedly. You were always a kind soul, so you had very little problem adapting to the newcomers. Even if some monsters were bitter toward humanity, you always tried your best to befriend them and show them the kindness that your ancestors had not. Through that, you made many monster friends, none of them you would trade the world for. But perhaps you could not change everyone's mind. You always thought that with the right amount of patience and persistence, you'd eventually break through to the other side. However, this didn't seem to be the case for the mysterious man you encounter one night. His anger and hatred frightened you, yet you couldn't bring yourself to ignore him. There was just something about him the drew you in closer, even if you knew it could be dangerous. Image used for the cover can by found on http://atomicshitpost.tumblr.com/post/135177890511/is-there-anything-i-can-do-for-you

Your a neko: (deal with it) your 'Master' has thrown you into a pond that had a waterfall going to the underground. After falling 1000ft down, you landed on a soft yellow flower patch that broke your fall. (Yes there's a small patch of buttercups on a raft.) and you were terrible afraid of water, what will u do?

woooaaaahhh

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

One day a young adult human female was coming out work, and had a strange feeling that something wasn't right until she pass one certain building then everything went black as the female felt herself falling into an endless hole until what seem like hours she finally fell through and fell flat on the floor without dying. She ended up meeting four other versions of herself and meeting up five other monsters. Later on she started living with them, that female was you (Full Name).

'Filled with power the Queen will rise but loving monsters led to her demise. (Y/n), Queen of Darkness' Frisk stared at the plaque and took a look at the tapestry. A girl with spade cheek marks, around her 20s held a parasol surronded by roses. She was accompanied by a monster who Frisk couldn't recognize but seemed oddly familiar. The two bore matching outfits, the girl a short sleeved purple dress with a white undershirt, a cresent moon decorating it. She wore long purple gloves as well. It seemed edwardian. The other wore a dark purple coat and pants. A white sweater underneath. Maybe they were a couple or something. Frisk shrugged at the thought and motioned for everyone to follow them further into the castle, missing Asgore's, Toriel's and Sans' long stares at the tapestry. "Is that....really them?"

WARNING: THIS CONTAINS HIGHLY MATURE CONTENT (BLOOD, VIOLENCE) READ AT YOUR OWN RISK Money 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: 81.390 Also contains mentions of nsfw [Rankings: #1 in #gaster (08/21/2022), #5 in #xreader (08/21/2022)]

Here is where I will be putting little bits of my stories. I will be updating the ones with the most votes or comments first. This is just a little thing I'm doing so I can get back into the posting things I write groove! I will update it as much as possible and probs once a day for a while... I have these stories stockpiled.

(Cover art by Zarla on Deviantart) I'm annoyed that people keep mischaracterizing my interpretation of Gaster so I'm making short stories as an attempt to characterize him 😁 I'm Gaster's wife and partner irl On that note, some of these will be x readers cuz I'm a filthy, filthy simp <3

you can and Dears us both just STAR ASKING AND DEARING US OR SAMETHING

Suddenly you find yourself in the Underground, with no memories and an unknown and painful past. Your first encounter is Flowey and he tells you how weird and different your soul is. What does it mean ? What happened to you ? A fated meeting awaits you. The beginning of everything. THE UNDERTALE P.S (GasterxReader) The beginning of the story is set some years after the war between humans and monsters. #9theories 9/05/2018 &lt;3 Thank you guys :D #8theories 10/05/2018 &lt;3 #1 gasterxreader 16/08/2018 &lt;3

Handplates: GASTER x Subject! Child! Reader! Make sure you know this is a Female Reader! The Full Cover is in my Art Book! Also. NO SEXUAL SHIT. This is Supposed to be a wholesome story! (Best ranking: #13 Handplates)

This story is about a girl named Y/n L/n. She barely managed to graduate highschool because she was one point away from failing. One day she decides to be a test subject to earn a little money on the side. She winds up in the company of monsters. She happens to meet a certain skeleton and her story goes from there. Disclaimer: I do not own Undertale. Undertale belongs to Toby Fox.

I lost everything in that fire, my neighbors, my memories-my bed... In a way, it was a not-so-controlled swailing, gifting me a fresh start in Ebott. So when I finally got a job here, I thought the universe was giving me a well needed rest. Well the universe has a morbid sense of humor, that's for sure.

you lived a bad life,to say the least,bullied,abused. Then,monsters came to the surface,you learned of your real parents, then met Him. (APOCALYPTIC SETTING) (SLOW BURN)