Chara (Undertale) FanFiction

Your Lives Are My Game [SHORTS]

Your Lives Are My Game [SHORTS]

F/F
F/M
M/M
Multi
G
Updated
11.04.2025
Fandom
僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga) Undertale (Video Game)
Characters
Midoriya Izuku, Midoriya Izuku/Yaoyorozu Momo, Midoriya Izuku/Everyone, Midoriya Inko, Yaoyorozu Momo, Chara (Undertale), Frisk (Undertale), Clover (Undertale Yellow - Master Sword), Original Undertale Character(s)
Tags
Self-Indulgent Midoriya Izuku-centric Midoriya Izuku Has a Harem Overpowered Midoriya Izuku Overpowered Yaoyorozu Momo Wish Fulfillment Pretty much entirely lmao Idea dump kinda Midoriya Izuku and Yaoyorozu Momo are a Power Couple
A series of (now canon-ambigious instead of canon) shorts related to the "Your Lives Are My Game" story. Decided to separate this from that since it must've been annoying seeing that story at the top of almost every Izuku pairing tag and then some. H...
Across The Multichaos

Across The Multichaos

F/F
F/M
M/M
G
Updated
11.04.2025
Fandom
僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga) 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime) 原神 | Genshin Impact (Video Game)
Characters
Original Characters, Dabi | Todoroki Touya, Chara (Undertale), Kong | Aether (Genshin Impact), Ying | Lumine (Genshin Impact), Paimon (Genshin Impact), Roronoa Zoro, Monokuma (Dangan Ronpa), Kiana Kaslana | K-423, Stelle (Honkai: Star Rail), Anya Forger, Saiki Kusuo,
Tags
Chaos Multiverse
This is a work of fiction that involves many fandoms and their characters alongside my own characters.
It's Not Too Late (Male Reader Edition)

It's Not Too Late (Male Reader Edition)

F/F
M/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Chara (Undertale), Frisk (Undertale), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Sans/You, Sans/Male Reader,
Tags
Slow Burn Friends to Lovers Humor PTSD lots of fluff male reader - Freeform And angst mentions of self harm Mentions of Suicide monster hate groups Reader is male You like kidnapping?
You haven't had an easy life. The mistakes you've made have carved literal scars into your mind and body. A precious life was lost because of you. But now you've moved to a new city, trying to leave all that behind you. You've got a promising new int...
Fŕįßk Jane đřēæmèr Potter

Fŕįßk Jane đřēæmèr Potter

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Original Characters, Harry Potter, Minerva McGonagall, Severus Snape, Ron Weasley, Hermione Granger, Ginny Weasley, Fred Weasley, George Weasley, Albus Dumbledore, Chara (Undertale), Frisk (Undertale),
Tags
Character Bashing Albus Dumbledore Bashing Manipulative Albus Dumbledore Female Frisk (Undertale) Harry Potter Has a Twin Harry Potter Has a Sibling Frisk doesn't like Dumbledore
Lily and James had three children their oldest Jake Potter, their hair, th middle child Harry Potter, the boy who lived and the youngest Frisk Jane Potter known to the Wizarding world as Jane Lily PotterThis story starts in Frisk's first year at hogw...
undertale asks and dares !!

undertale asks and dares !!

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Nice Cream Vendor (Undertale), Toriel (Undertale), Mettaton (Undertale), Flowey (Undertale), Grillby (Undertale),
Tags
Romance Other Ships Not Mentioned in Tags Prompt Fic LGBTQ Character LGBTQ Themes Pride Platonic Relationships Askbox Fic Comment Fic
rules in first chapterinspired by The1andonly_soup !!a lot of these are headcanons lmao
Where the Lost Become Found

Where the Lost Become Found

Gen
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Harry Potter, Tom Riddle | Voldemort, Chara (Undertale), Frisk (Undertale), Original Undertale Character(s), Sans (Undertale), Papyrus (Undertale), Toriel (Undertale), Flowey (Undertale), Harry Potter & Sans (Undertale), Frisk (Undertale) & Harry Potter, Harry Potter & Toriel (Undertale)
Tags
Family Fluff Past Child Abuse Tooth-Rotting Fluff Child Abandonment Protective Harry Potter Harry Potter is a Horcrux Harry Needs a Hug Harry Potter-centric Adopted Harry Potter Horcrux Tom Riddle and he gets one Toriel Adopts Harry
Harry is abandoned on Mt. Ebott by his aunt. Toriel left her husband after their two children died. Alone, they are broken and lost souls. Together, they are a family. (A Toriel raises Harry fanfic.)
What In The World Is Even Happening

What In The World Is Even Happening

Gen
G
Updated
19.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game) Deltarune (Video Game)
Characters
Harry Potter, Chara (Undertale), Frisk (Undertale), Alphys (Undertale), Dipper Pines, Komaeda Nagito, Enoshima Junko, Kris (Deltarune), Mabel Pines, Baldi (Baldi's Basics), Kirigiri Kyouko, Henry Stickmin,
Tags
Other Additional Tags to Be Added Chaos Not Beta Read I Wrote This Instead of Sleeping I'm Sorry What Have I Done I'm Bad At Tagging I Don't Even Know Chatting & Messaging Why Did I Write This? Ghost Chara (Undertale) Two lies one truth
It seems that adding random people from random universes to one chat might not have been the best idea.
Undertale Rant

Undertale Rant

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Sans (Undertale)/Reader, Sans (Undertale), Papyrus (Undertale), Asriel Dreemurr, W. D. Gaster, Papyrus (Undertale)/Reader, Toriel (Undertale), Sans/Sans (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel, Asgore Dreemurr,
Tags
Dirty Talk Death Anger Love/Hate Talking Cussing Rants Sins Threats Pulling about the Fandom
Well, Well, well...Your in the Undertale Fandom...Alright, read on if you dareThis ain't a StoryThis is a RANTUndertale's Fandom NEEDS thisPeople need to see how fucked up this Fandom REALLY is...So...Choose, skip this book, or read it...
𝐏𝐀𝐍𝐃𝐄𝐌𝐎𝐍𝐈𝐔𝐌

𝐏𝐀𝐍𝐃𝐄𝐌𝐎𝐍𝐈𝐔𝐌

F/F
F/M
Gen
M/M
Multi
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Chara (Undertale), Original Undertale Character(s), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Sans (Undertale) & Reader
Tags
Reader-Insert Wine Demon Summoning Demon/Human Relationships Reader is tired Reader Is Not Frisk (Undertale) Reader Is Not Chara (Undertale) Reader is an artist sans x reader undertale - Freeform Undertale AU Undertale Monsters on the Surface
" Pandemonium "(𝚗.)𝟷. 𝚠𝚒𝚕𝚍 𝚊𝚗𝚍 𝚗𝚘𝚒𝚜𝚢 𝚍𝚒𝚜𝚘𝚛𝚍𝚎𝚛 𝚘𝚛 𝚌𝚘𝚗𝚏𝚞𝚜𝚒𝚘𝚗; 𝚞𝚙𝚛𝚘𝚊𝚛.𝟸. 𝚝𝚑𝚎 𝚊𝚋𝚘𝚍𝚎 𝚘𝚏 𝚍𝚎𝚖𝚘𝚗𝚜 𝚊𝚗𝚍 𝚊𝚕𝚕 𝚎𝚟𝚒𝚕 𝚜𝚙𝚒𝚛𝚒𝚝𝚜; 𝚑𝚎𝚕𝚕.You wanted to forget about your grief and summoned a demon on pure accident. Turns out, he now has an ulterior motive. Sans may be a...
Quantumtale After Life

Quantumtale After Life

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Flowey (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel,
Tags
Alternate Universe - Quantumtale (Undertale) these are just short stories from that universe it's a bit different Female Frisk (Undertale) Frisk doesn't go back in time they just rewind the ages kind of It's mainly about Frisk and Sans They will progress in age in this Frisk is sometimes a sad bean
After a wrong RESET Frisk and Flowey got sent back in time when all her friends were around her age. The souls have been scattered around the Underground and they keep messing with time. After this RESET Sans is now able to control time. Frisk has ma...
METANOIA

METANOIA

F/F
F/M
Gen
Multi
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Papyrus & Sans (Undertale), Toriel (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel, Asgore Dreemurr, Chara & Sans (Undertale), Chara & Papyrus (Undertale),
Tags
Implied/Referenced Child Abuse Panic Attacks Death Alcohol Alcohol Abuse/Alcoholism mentions of abuse Alternate Universe - Swapfell (Undertale) Overdose trigger warning Undertale AU Swapfell Swapfell Nether
*The golden flowers must have broken your fall.   It took one wrong step and Chara found themselves hurtling into the caverns below, caverns overrun by monsters who’ll do anything to claw their body apart and take their Soul. Cruelty tainted their...
Mad as a Hatter

Mad as a Hatter

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Toriel (Undertale), Mettaton/Papyrus (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel,
Tags
Alternate Universe - Underfell (Undertale) Victorian era Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) Alternate Universe - Wondertale
She always felt she was different from the other people..however she never expected to be MADDER THAN A HATTER as she fell down that hole chasing a weird white rabbit. She will meet all kinds of people down in this fantastic world she discovered...th...
Upside-down

Upside-down

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Original Undertale Character(s), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Asriel Dreemurr, W. D. Gaster, Toriel (Undertale), Mettaton/Papyrus (Undertale), Frisk/Sans (Undertale),
Tags
Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) Alternate Universe - Overtale (Undertale) humans stole the monster magic and now they inherit it
Frisk is a monster that lives on the surface, however she always heard about the humans trapped underground after they stole their ability to use magic in the Great War...however Frisk is curious. As she was climbing up Mt. Ebbot trying to pick some...
some story that's inside my head

some story that's inside my head

F/F
F/M
G
Updated
12.04.2025
Fandom
Original Work Undertale (Video Game) Mahou Shoujo Madoka Magika | Puella Magi Madoka Magica
Characters
Original Characters, Chara (Undertale), Frisk (Undertale), Kaname Madoka, Akemi Homura, Undyne (Undertale), Flowey (Undertale), Lena (Disney: DuckTales), Webby Vanderquack, Chara/Asriel Dreemurr/Frisk, Nishijou Takumi/Sakihata Rimi, Sakihata Rimi,
those are story that anyone with better writing skill can adopt1)the torment of undyne2) Other idea of stories
ExperimentTale

ExperimentTale

F/F
F/M
M/M
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, W. D. Gaster, Toriel (Undertale), Mettaton (Undertale),
Tags
Other Additional Tags to Be Added Alternate Universe - Medieval Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) experiment frisk The Surface (Undertale) but it has modern technology kind of modern age? there is some bad language but it's minor a bit of PTSD involved
The monsters never knew what awaited them on the surface...or what would happen when Frisk, the last human to fall, would enter their lives. One of these monsters was Sans who was the first to be thrown off the rails of his usual resets. But somethin...
The Lone Star

The Lone Star

F/F
F/M
Multi
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Toriel (Undertale), Mettaton (Undertale), Flowey (Undertale), Asgore Dreemurr/Toriel,
Tags
Other Additional Tags to Be Added Eventual Romance Alternate Universe - Soulmates Eventual Relationships Eventual Fluff Soulmates Gaster is aware Lunaris [OC] has special abilities Alternative Reality Traveling this fic is long Lunaris is a human who can shift into a monster soulbound
“Life is a puzzle, a riddle, a test, a mystery, a game—whatever challenge you wish to compare it to. Just remember, you're not the only participant; no one person holds all the answers, the pieces, or the cards. The trick to success in this life is t...
Floattale

Floattale

F/F
F/M
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Other Character Tags to Be Added, Chara (Undertale), Frisk (Undertale), Original Undertale Character(s), Original Child Character(s), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Original Female Character/Original Male Character,
Tags
Rating May Change Original Character(s) Other Additional Tags to Be Added Freeform Help What Have I Done 车 I don't know Don't Read This I Tried Why Did I Write This? Please Kill Me
Years ago,199X, monsters were banished to the clouds.Year 201XAdvanced technology, pills, and so much more. Avyanna takes the right pills at the right time* In FT monsters main clothing colors are Cadet Gray, Gold, and Moonstone Blue **CANCELED!!! NE...
Closet

Closet

F/F
Other
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Asriel Dreemurr, Chara/Frisk, Chara/Frisk platonic, Chara/Frisk relationship if you squint
Tags
Based on a promt
You came here to be alone.You left there wanting to spend time with them.
Permanent Smile

Permanent Smile

F/F
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Toriel (Undertale), Mettaton (Undertale), Asgore Dreemurr
Tags
Depression Suicidal Thoughts Other Additional Tags to Be Added Hurt/Comfort Recovery Post-Traumatic Stress Disorder - PTSD Nightmares Self-Harm Suicide Attempt Child Abuse I promise Insomnia
All the monsters live happily on the surface after Frisk freed them. Well almost everyone is happy...As someone who has lived through their fair share of RESETS, Sans finds it hard to accept that this time is the last time. Especially since Frisk has...
Undertale, The Written Novel of Determination.

Undertale, The Written Novel of Determination.

F/F
Multi
Other
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, W. D. Gaster, Toriel (Undertale), Mettaton (Undertale), Asgore Dreemurr, Monster Kid (Undertale),
Tags
I do not own any text pretty much in this it belongs to Toby Fox Orphaned Work - Freeform
-Orphaned Work, will not be finished-Undertale is a role-playing video game created by indie developer Toby Fox.I decided to attempt to write a novel based on this game, I do not own hardly any of this text, it belongs to Toby and the undertale crew,...