#yandere undertale aus

[yanderes-galore]

Underfell AU Sans romantic concept please?

Sure! I tried to keep him as close to canon as possible while also putting in some of my HCs. He's actually really fun to write :) I hope you like my take... sorry if you don't. There's a gap in the middle due to Tumblr's formatting.

Yandere! Underfell! Sans Concept

Pairing: Romantic/Platonic

Possible Trigger Warnings: Gender-Neutral Darling, Obsession, Violence, Overprotective behavior, Violence, Anxiety, I wanted to make him more possessive (I might in the future but I never thought of it until now), Denial, Kidnapping, Mentioned possible mind break/Murder, Isolation, Stalking, Some jealousy mentioned near the end, Some manipulation, Forced companion/relationship.

I feel Fell! Sans has the possibility of being a terrifying yandere.

He's one of the strongest monsters in the AU and his powers tend to fluctuate due to his emotions.

He's also incredibly stressed all the time from what I've read.

Fell! Sans cares for his brother, they both care for each other actually.

They both want to portray themselves as cool to one another and others.

Fell! Sans is still lazy but also sarcastic.

I know Fell! Papyrus doesn't enjoy killing humans but does it for "sport" to help the guilt, he also does it due to being part of the Royal Guard to protect Sans from Asgore.

However I'm unsure how Sans feels about killing humans according to canon.

I'd assume he'd be indifferent but supports it as it's the law of the land and the job Papyrus is given.

Sans’ obsession was meant to be kept vague however I feel with a human it feels more natural to me?

Maybe you take the role of Frisk or simply aid them.

Either way I'm defaulting Darling to human.

Of course, naturally as the world goes, you end up having to defend yourself against Sans and Papyrus.

Primarily against Papyrus as Sans probably doesn't bother fighting.

Although… you can tell there's some strength there.

Due to what I've read, he radiates power due to his stress.

It's supposedly seen in his jacket at times.

So you have an idea that Sans could easily kill, but are thankful he just chooses not to.

Fell! Sans certainly has an obvious edge in appearance and personality. 

He's very sarcastic with you but in a way you can tell he means well when you befriend him and his brother.

In fact when he forms an attachment he may even show some anxiety about you meeting the other monsters.

You are aware of how easily you could just… die, right?

Even with a flower to guide you, he hopes you can defend yourself and not just talk things out.

Although he is thankful you managed to appeal to his brother enough to spare him.

He definitely tries to act calm in general, especially around you, although there's times he slips.

I imagine Fell! Sans fidgets due to… well… the sheer amount of stress he's under.

Really, who isn't in the Underground?

With Asgore in charge there's strict rules.

Rules that could easily end you as a human.

Sans tries to tell himself to not get attached to you.

He'd be in denial about his obsession.

It's all because he's scared to lose you.

Part of him wants to protect you, yet the other part suggests just letting you go.

The ideas he has tears him apart internally, which Papyrus can definitely tell.

Sans keeps fidgeting and his powers keep fluctuating when he thinks about how he can lose you.

Fanon tends to depict Sans as overly sadistic, while I agree he has aggressive tendencies like everyone in this AU, I don't think he's over the top.

I feel Fell! Sans is more like an anxious and stressed mess more than anything.

Which for him can make him volatile as his powers can be controlled, but are emotion based.

His pent up emotions no doubt drives his obsession.

While Papyrus protects Sans from Asgore, Sans feels like he has to protect you from not only Asgore… but everyone not him or his brother.

While you continue your journey, Sans isn't far behind.

He still has similar powers to his classic counterpart, which means teleportation.

Every area you enter, he's somewhere there.

I never mentioned this in the original draft but I do feel Sans would get possessive/jealous.

It's just not mentioned much in this concept since he's more consumed by anxiety than anything.

But in a way he does feel you two belong together, one way or another.

He would definitely murder, but he has to hold himself back due to his powers.

Which, yes, I assume would mean if he's jealous or enraged enough with you talking to others... his powers may flare.

Papyrus is against this but this human clearly means a lot to Sans.

Admittedly… Papyrus would miss you if you died too.

So he understands where Sans is coming from, it mirrors the care Papyrus has for Sans.

But Sans seems more… intense?

Sans could just feel something akin to close friendship or something more.

Honestly, if a monster nearly killed you, he'd probably snap and use his powers.

Which is why he prefers to just… stick around you everywhere.

Admittedly Sans likes it when you laugh.

He tries not to show it but you mean a lot to him.

The reason he tries to hide it as it shows vulnerability.

But you seem to enjoy his Knock Knock jokes and his company….

You like it because he's more “friendly” than the others.

Honestly, that gives him a bit of pride while also striking vulnerability in him.

Sans really keeps trying to tell himself his obsession is a vulnerability.

He shouldn't be this attached to you.

Yet now he really can't just let you go.

As a result I imagine he'd prevent you from meeting Asgore.

Sure, okay, you may have befriended most of the monsters here…

But not him…

Please not him…

He'll kill you and Sans will snap.

Scared of this he gets more fidgety.

You can probably tell even though he acts collected, he has an aura that scares you.

Sans doesn't know how to explain to you he cares about you.

He just doesn't want to lose you.

So Sans may try to manipulate you into staying with him more to avoid Asgore.

Isn't staying in Snowdin better?

Well… Papyrus may want to see you again!

Y'know… it's futile to go against Asgore, right?

Just… stay with him.

If he has to, he'll use some of his power to lock you away in his home/room.

Look, you don't get it.

Asgore nearly killed Sans before… he could and will do the same to you!

It's behind closed doors that Sans’ facade breaks.

He pulls you closer and mumbles about his fears.

He plans to keep you right here… if you try to leave, he'll know.

At this point he'll kill any monster who tries to hurt you or even goes near you.

Sans curses himself for getting so attached to a human.

However, he's given in now.

He'll keep you away from all the danger.

He'll keep you to himself.

Even if it requires others, including him, to get hurt due to his powers and rage.

[minthy]

The Star Sanses,

with the Map of the soul: 7 song that I think it fits with them, Because I miss 2019.

(forgot to post these doodles here, yay)

Persona: Swap.

"Actually I’m real good but a little uncomfortable,

I'm still not so sure if I'm a dog or a pig or what else,

But then other people come out and put the pearl necklace on me"

(Truth to be told, I have no idea what "swap sans" really is, He's just... well.. A swap, He doesn't even have a personality the silly, He just is there to fit for the plot of your AUs, heheh, Relatable)

Ego: Dream.

"I go back every day, To me of yesterday,

To the life of giving up, I let myself go away,

But in this world, you know, There are truths unchanged,

Time rushes ever forward, There's no ifs, buts, or maybes"

(I don't think he can get over what happened, his heart is big and his ego is bigger than to let him ask for guidance and support, man release us)

Shadow: Ink.

"I wondered everyday how far I'd go,

I came to my senses and I find myself here,

Yeah, hmm, shadow at my feet,

Look down, it's gotten even bigger"

(No matter how great high and mighty he's getting, the more the shadows of his past and constant need for stimulation are driving him to a point of despair and unsatisfaction, get a grip)

[cakesmelons]

HOLY SHIT ITS YANBERRY!!! I loved him when i was younger <3333

yknow how i said i'd being drawing stuff from old utau fandom? well here he is (i got distracted animating for a bit so expect more from the olden times today)

[hheisa]

Some News about this guy!!!

By a request from a friend, I'm going to start calling "Yandere Blueberry" as "BloodBerry" !!!!

This is because the expression "Yandere" is considered stereotypical for people with BPD and I also like the name BloodBerry

Hhehehhehehe BloodBerry

Also, to clear something: I'm not trying to romanticize this kind of stuff 💀 my only objective when drawing BloodBerry is to make him look creepy :p

[darkpetal16]

Play as a CUSTOMIZABLE scientist who catches the deranged attention of a siren while visiting an Arctic research base. 

Game includes:

Play as a smart scientist who makes really dumb decisions. 

Play as a smart scientist who makes excellent decisions that lead to self-preservation. 

Get adopted by a misanthropist socially awkward Dadster

Be stalked wooed by a delusional siren

Be kidnapped

Drive a snowjet! 

Race a friendly companion.  

Binge watch a series without realizing how much time has passed you by. 

Be drowned

Enjoy your stay at a five-star arctic research base that has zero casualties so far. 

Why do you keep finding bodies—

This is a 15+ romance/horror with an obsessive love interest. Please read the complete warnings list inside the game if sensitive or easily triggered. 

This game has one complete route to a "good" ending, and 9 "bad" endings with plans to add additional routes / bonuses. Siren!Sans belongs to @llamagoddessofficial on tumblr/ao3. AU was used with permission, although adjusted for funsies. (:

[greepuffer]

Three Sans, one you. This story has an open ending...I guess ;}

[dracoxirex]

mmmm...can u make yandere!cross x ink? 👉👈

Yep 😈

[pluttobones]

I wanna boil him

[zu-is-here]

Red

Fluffynightkiller Week by @help-im-a-gay-fish

An Unhealthy Obsession AU by help-im-a-gay-fish

Ccino by black-nyanko

Nightmare by jokublog

Killer by rahafwabas / rahaf-wabas / rahofy-sketch

[cjhern1109]

Practicing shading and…blood 🙂

Written in Blood by @sofiathehooman 🩸

Reference is from the manhwa, “Dreaming Freedom” 💭

Ps Human Writer Sans is designed by Sofia

[yanderes-galore]

Oh yay! Undertale! Can you write a yan concept for Nightmare Sans? ^^

Poor you... He's going to be horrible....

Yandere! Nightmare Sans Concept

Pairing: Romantic/Platonic

Possible Trigger Warnings: Gender-Neutral Darling, Obsession, Manipulation, Stalking, Sadism, Poor mental health/Talk of mental issues (Implied depression), Toxic behavior, Violence, Blood, Murder, Social and physical isolation, Kidnapping, Dark themes, Slight gore/Grotesque descriptions, Forced companionship/relationship (It's vague).

Nightmare would be difficult to deal with and get away from.

To you, he's the equivalent of an eldritch deity.

You can't kill him and your hate would only fuel him.

I mean, think about it.

Nightmare can traverse universes/timelines when he senses negative thoughts.

Cutting him doesn't kill him.

In fact, not much can hurt him.

The scariest example is probably an obsession who has little knowledge of the timelines and AUs.

That way you have no idea what Nightmare is... who he is... or what he wants from you.

You can get a similar result if you were aware of the multiverse, yet you might be more equipped.

Either way, Nightmare is drawn towards negative emotions.

As his obsession, perhaps you were going through a rough patch?

The good news about Nightmare is there's a low chance to get him as a yandere.

This is because in order to gain his attention, you have to have some pretty negative stuff brewing in you.

Nightmare would be the type of yandere to prey on weakness.

Nightmare would be more drawn to an obsession having poor mental health due to their environment.

The moment he's drawn to you?

Things only seem to get worse, unfortunately.

He'd be one of the more toxic yanderes.

Granted, they all are... but he's a special kind of evil.

When he senses weakness in his obsession, he pounces.

At first, he watches you.

He scouts you out, watching how you act, feeding off your negativity...

Then soon he starts meeting you, usually late at night where he blends in best.

I hope none of you were expecting him to be very... caring.

Nightmare would mess with your head, farming your negativity as though he's starving for it.

He acts as a manifestation of your poor mental health.

He isolates you socially by whispering bad thoughts.

He makes you think your friends hate you, that no one else cares.

All of it is lies, but those in a bad mental state are easy to manipulate for him.

His goal is to keep you to himself.

His "affection" is just a way to use you.

Considering what you have to go through to meet him, you're like a food source to him.

Nightmare is a monster in every sense of the word.

He watches you from afar, glowing blue eyes watching you with a certain hunger.

He loves your suffering... he feeds into it and off it.

Nightmare is good at manipulation, feigning care and compassion to lure you in closer.

As I said before, Nightmare would grow your negative thoughts.

Do you think everyone hates you? Well... he makes those thoughts louder.

They do, they always have... not one soul in your little world liked you or loved you....

But then he turns it around.

No one likes you but him.

Nightmare, as scary as he is, is your only friend and companion.

He plays the part, all a ploy to lure you in like an anglerfish.

He finds it cute when you believe every word he says.

You're in such a bad state you'd believe anything.

Who knows, you probably think he's some hallucination.

In reality, he's very real.

Nightmare would convince you to cut off all your friends and family.

He feeds you false promises of love, even sealing the deal with soft touches.

They aren't genuine, no, Nightmare views you possessively.

His feelings are more akin to a monster feasting on prey, or ownership.

His obsession isn't entirely out of pure love, if any love at all.

Every touch is calculated, every word planned.

You're going to be led into a sticky web of lies with him.

Nightmare plans to pull you deeper into the black inky thoughts you have.

If you think about it, he really is like a physical form of your current mental state.

He only ever seems to make things worse, too.

Nightmare would prevent any attempt to get better.

Therapy? Why even bother going?

You have him, don't you?

Please... he doesn't need you attracting his brother...

He's already taken claim to you, Dream would only ruin things.

Nightmare would keep isolating you and breaking you down until you're all alone.

Your negativity tastes wonderful to him.

By the time he feels you're all his... you can barely leave your bed.

You don't trust anyone, you don't know if you'll ever get better...

The only entity accompanying your thoughts is Nightmare, the ink black monster who never leaves you be.

Nightmare isolating you is important to him.

That way, even if you knew what he was doing, you can't leave.

Where else is there to go if all your bridges have been burned?

Exactly, nowhere.

Nowhere but back to him.

By the time you're ready to give up... he wraps you up in his arms, tentacle-like appendages dragging you tighter against him.

He promises to be merciful... to take you away from this place.

His words are more carefully placed lies.

This is the same monster who has definitely killed for you.

Any friends or family members who pry too much or get too close...?

Nightmare silently hunts them down, an appendage from his inky body impaling them in a bloody mess.

It brings him glee to know this will only make things worse for you.

The blood is quickly cleaned from himself whenever he "intervenes".

These acts have managed to give you the illusion of your friends and family really abandoning you.

Nightmare is a twisted individual, which is expected of his character.

His twisted behavior doesn't end when he lies to your face, saying he'll protect you if you just follow him.

He comments about you being unhappy in your life.

Don't you wish for something else?

Don't you want to leave?

Nightmare fakes the role of some guardian for you.

When you eventually agree, since you have nowhere to go, his grin turns sinister.

By the time you realize the true nature of Nightmare, he's already got you in his grip.

You can't tear yourself out of his grasp.

His grip is too sticky, forcing you to remain still as he teleports out of your world in a puddle.

Imagine if this was your first multiverse experience.

It's such a complex thing... and you only stumble upon it because Nightmare whisked you away.

No one's going to help you, you both know that.

His grip is unrelenting as he rambles about how much he supposedly "cares" about you.

He promises that you will have a new life... one different than your old one...

You'll live a new life by his side, forever...

But he never said your new life would be better than your old one.

[lavenderskye29]

The boys from @llamagoddessofficial ‘s Coraline au!

[cakesmelons]

Yanberry, although a yandere, is still Blue

y'all can imagine whoever you want as the person Blue's obsessed over <3

[hheisa]

He love you! :)

[silly-mutt]

Random doodles. 😽

[artale07]

aww cuddly Sans is soo cute =)

Ko-fi