Undynefan fiction

Character · 14,662 works

Undyne turns up in 673 works open to everyone here. The average one runs about 15,800 words. Read any of them in your browser, save it as an EPUB, or listen to it.

Works

Some results are potentially explicit

Undertale (Video Game)

The Heroine Appears

by rarmaster (rarsneezes)

"I’m not a hero. But I know there’s someone out there. Someone who’ll never give up trying to do the right thing, no matter what. There’s no prophecy or legend about someone like that. It’s just something I know is true. That someone like that will strike you down." MASSIVE SPOILERS FOR THE WORST END ROUTE!!! // and some pretty heavy depictions of a battle, so, be warned of that too

Teen 4.4k words 1 ch Complete 125 kudos

MASSIVE SPOILERS FOR WORST END ROUTE

Undertale (Video Game)

Make the World Afraid

by theragingprophet

You watched him unwrap his lunch, pouting. “C’mon, man. Not even a bite?” He started eating and you groaned dramatically. “I’m starving. I’m dying right in front of you. You’re killing me, Papyrus.” “good,” he muttered around a mouthful of food. “Wow, rude. I have no idea why we’re friends.” You sighed, eyeing the glittery burrito. “because you like to mooch off of me,” Papyrus snorted. He finished it off, cracking a grin when you whined in distress. “besides, y’know i only eat this because m’lord made it. he can always tell when i give it away. i’ll get ya something from a food truck later.” You nearly cried. “Thank you! I swear, I’ll pay you back when I’m a millionaire.” “so, never?” “I’ll try.” Papyrus shook his head with a grin, reaching out to pat your head. “guess that’s better than nothing.” You beamed, soaking up the affection. Papyrus always had your back. But… you were still so hungry. You worried that soon, food trucks wouldn’t be enough. Nothing would. ...arc one: The Happiest Town in Town | completearc two: Join the Family Business | completearc three: Deep Love | complete...

Teen 119k words 105 ch Complete 2.5k kudos

Alternate Universe - Swapfell · Alternate Universe - Horrortale · Alternate Universe - Underlust · Alternate Universe - Mobtale· +9 more

Undertale (Video Game)

What Are Friends For

by IchikoWindGryphon

Undyne and Papyrus are the best of friends. But when Undyne learns Papyrus's greatest secret, it pushes their relationship to the brink. Things only get worse as she learns of the skeleton brothers' traumatic past, and the horrors of Dr. W.D. Gaster.

Teen 185k words 27 / ? ch In progress 1.4k kudos

Abuse · Controlled Transformations · Gaster Blaster AU · PTSD· +1 more

Undertale (Video Game)

Sick

by tsukithewolf

Frisk comes down with pneumonia and they are very unhappy about it. The monsters try their best(?) to help.

General 5.2k words 1 ch Complete 1.3k kudos

I'm not good at coming up with story names · Sickfic · There are a lot of fluids · Worried monsters· +4 more

Undertale (Video Game)

waterproof

by seventhswan

Undyne sent her dad postcards all the way through her training for the Guard. Here’s a photo of me creaming some guy, here’s a photo of me with the King, please find attached to this postcard a vial of my opponents’ tears, that kind of thing. Undyne becomes a knight, burns her house down, learns about families, gets a Valentine’s card, goes on a terrible date, and finally finds her place.

General 4.7k words 1 ch Complete 961 kudos

Female POV · Ensemble Cast · Mostly Gen · Disabled Character· +4 more

Undertale (Video Game)

Good Company

by feralphoenix

Chara's piano lessons continue. Undyne has an idea.

General 1.1k words 1 ch Complete 545 kudos

Implied/Referenced Child Abuse · Implied/Referenced Bullying · Implied/Referenced Self-Harm · Alternate Universe - Everyone Lives/Nobody Dies· +2 more

Undertale (Video Game)+2

Trade all my tomorrows

by SheenaKazia

A much abused Underfell Sans trades places with the overly adorable Underswap Sans. While UF Sans struggles to overcome his fears and insecurities US Sans has his core belief challenged. Everyone can be a good person if they just try. Even this fallen Papyrus can be good . . . Right?

Teen 100k words 49 ch Complete 540 kudos

Abuse · Redemption · Regrets · Betrayal· +15 more

Undertale (Video Game)

for darkling green

by feralphoenix

Asriel has a question for Undyne.

General 1.2k words 1 ch Complete 513 kudos

Alternate Universe - Everyone Lives/Nobody Dies · Post-Canon · Spoilers - Undertale Pacifist Route · Ensemble Cast· +1 more

Undertale (Video Game)

The Musician Sans x

by Anonymous

You were just a simple monster, you looked human, so you stayed away from society. Only peeking out to play on your piano, filling the nighttime streets of Snowdin with your music.Until it comes along.Sinister, killer, unclean, you know that you must stop it, but how can you. When your human appearance is more likely to get you killed than to help them listen to you.Unless, you don't go to them at all, you go to him.

Teen 28k words 28 ch Complete 502 kudos

Music · Magic · monster reader · Monsters· +6 more

Undertale (Video Game)

A Big Fish Story

by Decker

Undyne didn't start out as Captain of the Royal Guard. She started out as an angry, bratty kid looking to pick a fight. Along the way she dueled a king, made new friends, and almost met her end. This is her (somewhat unbelievable) tale.

Teen 26k words 8 ch Complete 485 kudos

Pre-Canon · Suicidal Thoughts · Eye Trauma · Alphynecentric· +1 more

Undertale (Video Game)

Extra Credit

by FriedCatfish

Undyne loses track of time watching anime. Set before the events of the game.

General 1.2k words 1 ch Complete 473 kudos

Fluff · how long did these nerds go before realizing it's mutual · does alphys even own a couch tho

Undertale (Video Game)

Cherish Harder

by CatKing_Catkin

Takes place before the events of the game. Papyrus has taken it into his head that joining the Royal Guard is his path to friends and popularity. Undyne is more convinced by the day that joining the Royal Guard is not for him. She realizes that she's come to like having him around, so that means it would only suck more if he got himself killed by a human. Sometimes, being a hero means making the hard choices. Still, sending him away only leaves her feeling worse about things. With a little help from her favorite nerdy scientist and Papyrus' weird brother, Undyne learns that the strength to fight is not all there is to life, and that even heroes are allowed to have friends.

General 4.3k words 1 ch Complete 457 kudos

Pre-Canon · Developing Relationship · Developing Friendships · Male-Female Friendship· +13 more

Undertale (Video Game)

Bitterness

by MiniNephthys

Undyne on the skeleton brothers' couch.

Teen 505 words 1 ch Complete 448 kudos

Spoilers · Depression

Undertale (Video Game)

lessons

by simplycarryon

Undyne plays piano. You'd like to learn.

General 500 words 1 ch Complete 414 kudos

everyone lives au

Undertale (Video Game)

no way back

by MiniNephthys

Papyrus joins the Royal Guard. Undyne doubts herself.

Teen 1.1k words 1 ch Complete 370 kudos

Angst · Child Death