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  • Gaster x Reader: Trusting The Man Who Speaks In Hands
    38.8K 1K 12

    Your walking through waterfall when a door you've never seen before, materializes before your eyes. When you open the door you see him...

    Mature
  • W. D. Gaster x Reader Oneshots (Requests Closed)
    134K 1.8K 11

    I am completely enamored with this character right now. Finally, someone I can unleash my 'dad' kink on~ They are most likely not going to be canon to his character at all, but I'll try to keep some things straight. But I am sticking to the theory that Sans and Papyrus are his kids. Hope y'all like em! :3 Cover art...

    Mature
  • Scientist - GASTER X READER
    148K 4.2K 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 at...

    Completed  
  • CREEPY SMILES |Gaster x Reader
    10.7K 353 18

    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!

  • FRUIT OF THE VOID (Gaster X Reader)
    17.2K 791 12

    Dark, darker, yet darker. The darkness keeps growing in your life. You don't know why, but there's someone relentlessly haunting you. He won't leave you alone, and every dream you have is a nightmare. It seems peace is currently impossible for you. What great evil could possibly want to harm you? You never felt that...

  • Functioning With Society | W.D. Gaster x Reader
    9K 430 12

    After adventure comes a happy ending. That's at least what the world tries to teach us. They whisper a "the end" but the tale still strives. Maybe it's not written, or coded, but it continues in your mind. Though, this is reality. It was a surprise that the monsters were able to grasp freedom after so many years of...

    Mature
  • Fear Me- Handplates!Gaster x Reader
    49.8K 894 14

    WARNING!!! This story WILL contain rape/noncon and gore, inhumane treatment of the reader, and NO ROMANCE until possibly very late in the book. I plan to update frequently but that may not happen. This is being written as a guilty pleasure type thing to make me feel a little better about some of my messed up fantasie...

    Mature
  • Gaster X Reader
    17.6K 307 12

    I have nothing better to do so what the hell gotta take a risk now and again, eh? Hope you enjoy!❤

    Completed  
  • HP (W.D. Gaster x Reader)
    57.2K 1.8K 20

    You lost your father in the war against the monsters. If it was up to you every last being that fought against man would be sent to execution. But it wasn't your choice.... unless it was? That's when you decide to visit the underground. All you needed was one excuse to rage another war against the monsters this time...

  • Gaster x reader
    13.6K 250 30

    In this book I plan to do one shots for Gaster the royal scientist, for the underground. Requests are accepted and would really help in the making of this oneshot book. I will not do lemons due to the fact that...... (Throws hands in air and falls to knees) I do not know how to!! anyways hope you like the book. Since...

  • Glowing Souls (Gaster x Reader)
    7.8K 242 8

    You are about 15, Gaster is 17. In this Gaster is an older brother to Sans and Paps. Asriel is about 6 along with Frisk and Chara, who show up later. You and Sans are best friends, but Gaster is amazing! At age 17 he is the royal scientist and you hope you can help him out.

  • ∆°{The Darkest Souls}°∆ | Gaster x Reader
    14.8K 593 7

    When the monsters were sealed in the Underground, a few humans, still loyal to monsterkind, went with. (Y/N) Was one of them. She was a Scientist, one of the most brilliant minds of the monster world, and ended up working alongside the Royal Scientist. W. D. Gaster. And, despite her knowing better, began to grow attac...

  • 'Teach me to love again' Gaster x Reader
    4.9K 192 3

    *This book will take place during the comic by deadpool4ever at Tumblr.* I would suggest the dub by two all nighters on YouTube. :3 I'll put it up there. You are papyrus' teacher at the snowdin school in the underground. and yes you are a human. but why would they keep you alive if you are human. the thing was, yo...

  • Fallen Angel (Gaster x reader) OLD
    146K 5.9K 49

    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...

    Completed  
  • W.D. Gaster X Neko Reader
    4.2K 79 7

    W.D. Gaster studies love. He studies his test subjects then kills them. But here's the question. Will he kill you? Or will you forever be in his heart?

    Completed   Mature
  • W. D. Gaster x Reader
    182K 3.2K 42

    A collection of one shots between you and the man who speaks in hands. Some will be long, some will be short, some will be happy, some will be angsty, some will be fluffy, some will be smutty. I will write for certain AU's, but don't be offended if I ask for an explanation of the AU you request, I don't know them all...

    Completed   Mature
  • The War Amongst Us (W.D. Gaster X Reader)
    63.5K 2.9K 24

    (Y\N) is a young female spy and soldier fighting in the War of Humans and Monsters. She is fighting on the humans' side of the war until a turn of events when she becomes apprehended by the enemy. What will happen when a young monster scientist tries to change her views? Thanks to Itachei on Deviantart for letting me...

  • Gaster x Reader- Not Your Fault
    104K 3.3K 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 ap...

    Completed  
  • Idealistic: Gaster x Reader {Completed}
    57K 1.8K 46

    *front cover belongs to me* It's another beautiful day in the Big Apple, and what better way to celebrate it than to go to your new work. What will you learn? How will the events unfolding lead to love? This whole book is now cringe to me. I forget how chaotic this fan base is. :p

    Completed  
  • - My Angel from the Sky - Gaster x Reader
    87.7K 3K 30

    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) Th...

  • The void in my heart (Gaster X Reader)
    29.3K 811 22

    You're a human girl, living on the surface with Frisk, who is your younger sibling. You one day find two children, who's been chased away from neighborhood to neighborhood. And with you're kind soul, you couldn't leave them to live in the streets. You take them in, and meet their father. But will one day, lose them, b...

    Completed  
  • Gaster x Reader
    28.9K 823 5

    You had been getting these weird warning, mainly from Sans. You packed plenty of healing items and your heart locket to see what everybody is so scared of. You soon meet not only your friend, but a fun skeleton who stole your heart (not literally!!!)

    Completed  
  • Gaster x Reader
    158K 4.2K 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, a...

    Completed  
  • Subject 108 (Gaster x Reader)
    37.1K 1.5K 59

    Under editing Every-night you dreamt of a strange man, the strange Dr W.D Gaster who you fell madly in love with. With each passing day you grew closer and closer, but everyone has secrets... Even the seemingly perfect Dr Gaster. (WARNING GORE, SWEARING AND LEMONS) Cover art by @Redwolf878

    Mature
  • A Mask Of Scars (Gaster x Reader) (ON HOLD)
    10.4K 475 32

    This story is old and the big ew. Please don't read until I change the bio or I will commit slip n' slide, sauce on the side, sewer slide.

  • Chipper Fellow (W.D. Gaster X Reader)
    9.8K 335 6

    chip·per ˈCHipər/ adjective/informal cheerful and lively _____________________ Not everyone would've described this skeleton man as 'chipper' at first glance. But [Y/N], someone with first-hand experience on how he acts, would definitely describe him as such.

  • We Studied and We Fought and We Killed [WD Gaster x Reader]DISCONTINUED
    3.3K 104 14

    !!!DISCONTINUED!!!(Before we get into what this story is about, I would like to clarify a few things. this story may contain some Hamilton references. It won't have any smut because I get awkward at those parts. The most that will happen is kissing. If you want me to make a smut chapter, comment. My notes during the s...

  • Handplates Gaster x Reader The Secretly Brocken Promise
    6.3K 98 5

    its all about (Y/n) relationship as Best friend's they've been friends sins kids until ther grew up as Adults They made a promis many years ago that they'll protect ech other and all weys stick together Better or worst By Plus they dont know they have a Crush at ech other But when gaster made sans and papyrus Gaster o...