1 - 20 of 78 Works in Chara (Undertale)/Reader
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I know I know, it's supposed to be kinktober, but hey? Let's do Ausctober, sha'll we? sksks (CANCELLED)
there is no smut! but there will be some smoochie :D
different chapter, different au, different theme!
let's begin, sha'll we?
NOTICE!: Fuck this, my RL ain't allow me to do it, UGH I HATE IT SO MUCH but... I'm not gonna abandon this, instead, I'm gonna fill this with oneshot! or some scramble
Sorry I give up huhu
Chapter: 1. Remembering you (ut sans/reader)
Chapter: 2. A meeting with you is sweet… more sweet than the dessert (swap sans/reader)
Chapter: 3. How far? Another universe, baby. (fell sans/reader)
Chapter: 4. The way to the hospital (HT sans/reader)
Chapter: 5. - -
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Something about loving Chara dreemurr..
Or
I'm jingling this for the Chara simps since there's barely any reader inserts for both their AU versions and original version..
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Human and Monster conflicts are at an all-time high, so you use an opportunity your college gave you to visit the UNDERGROUND to learn more about its residents. You meet some new friends while you are down there and decide to help advocate for monster kind, however as you spend more and more time in the underground weirder and weirder things keep happening. On top of that someone seems to be taking an interest in you, but they do not know how to handle their emotions and do not quite trust you. Thankfully, you're not going anywhere.
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100 years in the underground and finally the monsters has breached the barrier and arrived to the surface and by the help of Frisk Dreemurr she used the 6 human souls and reviving the monster legacy.
Although humanity is still the same even after hundreds of years evolving from swords and spears to guns and nuclear weapons, but some accepted the Monster kind and many were against it.
The monsters needed homes and by the hand of Jessalyn Knox the director of the phoenix order and Princess of Paradise she lended her strengths to the Monster kind for food, jobs, and homes.
2 and a half years on the surface and yet.. people are yet to ruin the monsters freedom..
Series
- Part 1 of ({_-THE FALLEN ONES-_})
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Top of the class, bottom of the heart by reincarnatedfrog
Fandoms: Undertale (Video Game)
27 Sep 2025
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Monsters have lived alongside humans for a decade now, and you’ve dedicated your studies to understanding them. But on the first day of your third semester, a scoreboard in the university’s new building throws you off balance—because the top name belongs to someone you’d have sworn wasn’t even trying to stand at the top.
Get to know a strange human with an even stranger family and friends, and experience chaos across both the surface and the underground in this little writeup of mine!
Story mostly exists cuz I am a Chara simp and there's not enough slow burn out there that gets heated later on ngl. -
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At the end of the genocide route, the player character asks the player to end the world alongside her...
And she won't take no for an answer, so desperate times call for desperate measures.
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you are the end (and i the one who followed) by kristruther
Fandoms: Undertale (Video Game)
07 Sep 2025
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You lose them, the only person that made you whole. What is love, if not the devotion that makes death feel like a reunion?
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A mutation has spread across the globe when monsters were released, humans either dying as their bodies couldn’t handle it or mutated with the rest.
The mutation was simple really, a change of dynamics. Humans started taking more unusual forms, growing more than a few ears, eyes, arms, legs, shit even a head at one point. Or body morphing differently altogether. Turning into their worst nightmares.
Y/N being a young child at the time of the outbreak changed with the rest of her family, half of her family died or killed themselves resulting in her being an Orphan at a young age, left alone in the world as her body shifted and changed. Body becomes leaner, smaller…cute. Cat-like ears and tail sprouting from her body, legs breaking and reforming into back hind legs of a cat's, fur covering her legs stopping at her waist.
Not only that, but she is an Omega.
Of course she doesn’t know oh no no no blissfully unaware, well that is until an over caring human Frisk decides to visit the Orphanage dragging along her friend Chara. Whom in turn absolutely dreads the visit. Let's say…frisk was the door to meeting a rowdy group of skeletons…
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Runaway (FANMADE CONTINUATION) - OG by Scriptor Bellum. by CharaDremurrTheFirstFallen
Fandoms: Undertale (Video Game)
26 Aug 2025
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Alright. This is a continuation of someone else's work, but it has not seen an update in three years. Frankly, if they won't finish it i'll do it myself, even if the plot changes as a result. In specific, this is a cont'd of Scriptor_Bellum's Adult!UnderFell!Chara X fem!Reader, called "runaway," so go read the two chapters that exist for it as of the writing of this, just for context.
That being said, this story shall begin when you two survived the fall. As that is where Bellum left off.
So let us begin.
I hope you will enjoy.
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I Will Take Your SOUL and Break Your Heart by i_never_ate_raindrop_cake_but_i_want_to
Fandoms: Undertale (Video Game)
22 Aug 2025
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A story that narrates the adventure of a young woman and her new Human — but also Monster! — friends. She wants to be able to give everyone the Happy Ending they all so crave.
They need help in ending this Sorry Tale before it is too late.
ᯓ★
He asked you why you betrayed him. His breathing was ragged, and his hair did not have the same pleasant odor of coconut oil and wheat that you had grown to love. It was musty, reminding yourself what kind of monster you had in front of you.
Not a Monster, but a monster.
The meaning of his name didn't carry his personality anymore.
"... Ironic, is it not? Since I am not the one who is holding a dusty knife right now."
Series
- Part 1 of Petrichor
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The Random Collection Of Romances by CharaDremurrTheFirstFallen
Fandoms: Undertale (Video Game)
02 Jul 2025
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This will likely be where I post most of the random ReaderXChara spice I make whenever I'm bored. But I may also post other various Female Character X reader skits in the future. Idk. ENJOY THE SIN YOU BASTARDS!!!
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By Choice {A Chara x Reader Undertale Fanfic} by imtooshortforyou
Fandoms: Undertale (Video Game)
25 Jun 2025
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Y/N was never the type to be around people. She didn't have many friends besides her sister, but she didn't mind. It wasn't until Frisk and the Dreemurr family came along and became the family she had once lost.
Through Frisk, Y/N is able to realize the power of their determination. One night, as Y/N is hanging out with Frisk and Asriel, the topic of Asriel's dead sibling, Chara, comes up.
For some reason, the conversation led Y/N to want to explore the underground, for maybe there's a lonely ghost wandering around all alone with nobody to talk to.
Reader, Frisk, and Chara use She/They pronouns
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"There is nothing left for us here. It is time to leave this place behind."
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Just the story of a lonely flower whose determination to feel brought a miracle upon him.
Is it really such a crime wanting to be loved?(Based on the song Guardian of Loneliness/孤独の番人 by SCL Project)
(CW: this is a story with a yandere-like character, there will be themes of violence, toxic relationships, manipulation, etc. as well as themes of depression and self-loathing. Read tags for further information.)
Chapter 5: Soon. I've been extremely busy at work, so updates might be either monthly or every two months :c
Slow updates.
12/05/25: Chapter 4 up. It's been a while.
11/22/21: Still on hiatus, but easing my way back into writing. Just know I'm slowly working on this. I already fixed things my other fic, so I may change up a few things here too.
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Nothing ever stays dead.
The disappearance of Frisk left a heavy mark on you, and her return forced you to face consequences you never expected.
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Instead, you can’t stop yourself from craving more and more of their light. The more you see, the more you want to see.
Your greatest dream has become shaped by them. Someday you want to hold this star close to you, safe in your hands, and show its owner how beautiful they are. That someone can treat them kindly. That they don’t have to be angry with the entire world, and that it’s okay if they’re afraid.
Because you think that’s what they need to know.
Because where there is anger, there is always something else underneath it.
adult!Chara x fem reader
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Cross sans x reader stuff by Ayano_The_Glitch
Fandoms: Undertale (Video Game), Underverse (Fandom)
26 Jul 2024
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Hi. Yes, I'm here too. I sure am in a lot of old fandoms, aren't I? But yeah, this is a book about the lovely Cross Sans.
I barely see any love for him that isn't sanscest. And, I don't exactly ship any sanscest with him in it, so I'm here to fill at least a little of that empty "x reader" spot with all my love and passion made into writing for the beautiful boy.
(Cross is a Au/version of the original Sans and is made by jakei95. The original sans belongs to Toby Fox in his game, Undertale.)
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Inspired by someones who's name begins with chocolatte.
The game is rigged, but even a rat can brake an iron wall if you give them enough time.
Just keep pushing, over and over again, victory is finded beyond the dark so keep going.This is a bit... crack? Idk, options begin after chapter three since the fic already began a time ago
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Random NSFW Headcanon Alphabet for Fem. Chara
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2018 and the Kinktober (closed forever) by Niya_Wonderland
Fandoms: Undertale (Video Game)
07 Feb 2024
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Kinktober challenge, offer up some ideas and I will write. you can include your OC