1 - 20 of 123 Works in Adult Chara (Undertale)
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Summary
Asriel, along with his college roommate, Chara, want to get some extra credit with some volunteer hours! They gain some work at the high school back in Asriel's old town. But while there, they find an entrance to a mysterious dark world.
Series
- Part 1 of Chararune
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Half-Tale: The Fallen by HolmesJaw
Fandoms: Undertale (Video Game), Half-Life (Video Games)
15 Nov 2025
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Corporal Adrian Shephard, a US Marine Corps soldier assigned to the HECU division, was sent off to Black Mesa for 'cleanup duty'. Despite the hell he went through, the marine somehow manages to escape the dangerous, alien-ridden facility against all odds and, after being 'detained' by the ever elusive G-Man, is then assigned a new mission many years later... to the UNDERGROUND!
Accompanied by Chara Dreemurr, the first fallen human turned apparition, the two journey through the unprecedentedly large Underground for one, very specific goal... but what exactly was it? And is that all there is to it?
In... time, all will be revealed.
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Exponential decay, entropy, heat death of the SOUL.
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Frisk lights up as they slip through the door.
“You came!”
Chara sighs, and shuffles over to slam the pretty-people-discount coupon on the counter. What a stupid little slip of paper. But, a discount is a discount, and 75% off is a downright steal with how much people tended up mark up flowers around this time of year.
“Just something to say ‘I miss you’ for Heir’s Return tomorrow.” They mutter.
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fluffy charisk bullshit tattoo artist x florist au! with a little angst to taste, and chara and frisk being foils, because what’s more romantic then being each other’s foil characters?
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The monster she fell in love with, had paid her to have sex with someone else. How cruel was that?
Frisk was a petty thief with nimble fingers and a charming smile. Before it all started, she had been on her own, and it was enough to survive. Stealing was easier when your charm had their guard down.
Then she met Sans, and suddenly she found the hope to live. Like a puppet on a string, he’d gotten her along to participate in his crew’s heist, despite being the only human on the team. He insisted on training her flirting skill and even resorted to kissing her whenever they had to teleport. He was enough to make her heart flutter dangerously, and she had to constantly remind herself that it was never going happen between them.
So why did he suddenly change his mind the morning before the heist? Why did he no longer want her to do the very thing he had recruited her to do?
Just as she found out, it all came crumbling down on her. -
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The sounds of soft knocks took their attention away from the screen. They stared at the door, bewildered. Who was awake at this time of hour? They waited until another series of knocks to confirm someone was there.
There were two guesses. One was their roommate, but that was immediately crossed out since they had a key to their room plus they were still out of town. Second, was the RA but they were positive they were asleep at this hour.
Hmm… Perhaps a small distraction could clear their mind.
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Frisk, suffering issues being an ambassador for monsters, fucks with Chara in order to get away from these problems.
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My Choices Matter by Kass_slash2006
Fandoms: Deltarune (Video Game), Undertale (Video Game)
07 Aug 2025
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After countless times reliving the same few days and forced to make decisions that are not their own Kris is tired, Then when the entity that controls them decides to do a peaceful play of their life something new happens. A slip of control. The entity that once held power over their head like a puppet master is reduced to nothing more than a narrator. Kris knows this is their chance and that they must act fast but what can they do and who can they trust?
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After many many many resets including both pacifist and snowgrave routes, the player loses control of Kris on pacifist route when they open the dark fountain in the Dreemurr house. Kris now has a chance to prevent the player from gaining control, find out who is behind their possession, and maybe save a certain dark furred dear from their control too.This is my first fanfic so any constructive criticism is appreciated thanks :)
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The King and Queen disappear seemingly overnight.
Despite the councils efforts, the two heirs attempts, and the long wasted work-nights of Governor Holiday, the Undergrounds struggles increase in severity until drastic measures are needed. After the ruling council's flimsy excuse for their royals' absence, trust in their organization drastically decreases. The Underground grows suspicious, divided, and restless. The Council's hand is all but forced to into a rushed coronation of the two heirs, asking all to leave the era of mourning behind.
Asriel and Chara step up to rule, but on the day of their coronation, a wounded creature of unparalleled power steps through the barrier. Widespread panic, the uncovering of a secret plot, and a growing feud between the two heirs split the Underground apart. Chara's tirade for justice leads them down a darker, darker path, leading a grieving Asriel to pick up the pieces.
When a new human enters the equation, Asriel promises to end this madness for good. Even if that means opposing his best friend, the royal guard, and the entire Underground in the process.
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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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A vase of Marigolds is overturned by a 7-month-old and shatters. Chara likely needs more consolation than Bourn does.
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- Part 5 of The Fell of Frisk
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Frisk, a young adult, freshly out of high school, ready to start their life...
But by the turn of events, they end up falling into hole in local mountain... that turns out to be a long forgotten prison of Monsters. But they have one single question.
Why most of population is wearing striped clothes?
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After Chara is freed from the Void, reunited with her friend, Gaster, and gone through a Reset of time, she must now help guide young Frisk through the Underground, showing her how to get through without harming anyone.
(Female Adult Chara, Female Frisk)Series
- Part 2 of Undertale Fallen Determination
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Chararune - Weird Route: Determined by EyeOfArgus
Fandoms: Deltarune (Video Game), Undertale (Video Game)
16 Nov 2024
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You take things in a weirder direction. Frisk is guided down a path that will make them more powerful.
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- Part 2 of Chararune
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The College Fic No One Asked For by Fyn_Lives_In_The_Void
Fandoms: Undertale (Video Game)
10 Nov 2024
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Gaster’s life had been a simple one, built around a routine he found comfortable and familiar. Five days out of the week, he taught physics at the university where he worked, spending his lunch break with his two sons, both students at the same university. Each morning, he stopped by the coffee shop on campus for his morning coffee, spending a little more time there on weekends to work on his latest book. It wasn’t the most exciting routine, but he found it safe, familiar, it was his life.
So when the university hires a new groundskeeper who basically wreck his safe routine…what’s he to make of him? It doesn't help that his appearance seems to have triggered a domino effect that just takes Gaster's life off the rails. This professor needs a nap damnit, he's too old for this.
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We're all mad here by AmandaGrace148
Fandoms: Undertale (Video Game), Deltarune (Video Game)
02 Oct 2024
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On a quiet morning, Chara reminisces of their adventures in Wonderland to piano. How they longed for it, how they missed their family, their friends and their one and only. They were sure, if given a chance, they'd give anything so they could go back.
But... they couldn't do as they wished. As they had to protect Kris. And for their precious child, Chara was ready to make this sacrifice, so their child had a chance for a happy and safe life.
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- Part 2 of 31 Day Disney Challenge
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While on vacation, Asriel, Frisk, and Chara tried their luck. They got his parents out of the hotel room, but not for long enough. Frisk didn't mind, and Asriel got over it. Chara had been over it... until Asriel promised to make it up to them (during the window when he still cared). Chara ends up waiting to collect until late the following night.
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- Part 9 of One Paw at a Time
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Chara and Frisk have a picnic on the surface, and are joined by an expected, unexpected guest.
(Two siblings, and the child they co-parent together.)
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A What-if fic based off of “What if Frisk aged with Resets?”
Fem!Frisk headcanon
Male!Chara headcanonFrisk in 1st Chapter: 13
Frisk in 11th Chapter: 19
Same goes for Chara (Although Chara is slightly older than Frisk by about 2 weeks)