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UTMV Headcanons

Summary:

Just a collection of various general headcanons I have surrounding the Undertale Multiverse.

Chapter 1: Sanses Mental States

Notes:

- all the Sanses have something wrong with them
- and by that I mean in every AU there's SOMETHING going wrong in that skull of his no exceptions
- they are not the poster figures of mental health folks

For Those Unfamiliar to These Characters:

Blackberry = Swapfell Sans
Raspberry = Swapfell Red Sans
Wine = Fellswap [Gold] Sans
Crop = Farmtale Sans
G = Echotale Sans

(See the end of the chapter for more notes.)

Chapter Text

- Classic is obviously depressed and has PTSD, but ironically he's the most stable out of them all
- he's like the war veteran grandpa
- is also low-key a bit of a control freak
- being out of his AU and it's predictable reset patterns stresses him tf out and makes him obsessed with taking the reins of every interaction he has
- secretly sees the others as his copies; that they all revolve around him
- low-key a narcissist
- is very possessive of the multiverse, does everything he can to prevent the event of a multiverse 'RESET'
- has nightmares of forgetting them all and going back to the maddening monotony and crushing isolation of facing the genocides alone
- he actually puts in effort to be better bc of his new AU friends and he loves them all very much

- Red has troubles with self-esteem and low-key self-harm/suicide issues; he's never gotten to that point but he's thought abt it once or twice :(
- always blames himself when things go wrong even if nobody is mad at him
- overthinks everything; especially when he's nervous or pushed into a situation he's unfamiliar with
- isolates himself when he blows up at his friends or accidentally lashes out
- is more sensitive than he lets on; when his feelings are hurt he covers it up with anger
- emotionally latches himself to people who show him any kindness or compassion and hates himself for it
- the biggest self-sacrificer; when shit hits the fan his first impulse is to help his friends at the expense of his own safety/health, often jumping in with self-destructive methods
- bitter knowing how much better other AUs are, yet people regard his AU as one of the more fortunate ones; it frustrates him that he feels like he has to bottle up his grievances and pretend his Underground was no worse than others when he feels very differently
- is on everyone's watch list; nobody actually knows the full extent of it but the others all low-key suspect he's not as okay as he lets on

- Blue has codependency, obsessive-love disorder and abandonment issues
- being self-aware of the resets and how his own universe sees him as a naive child has really fucked him up inside
- wants to be seen as someone who's needed, someone worthy of adoration and dependability
- joined the Stars to gain the attention and admiration he craves on the multiversal stage
- latches onto the sanses who go to him to provide any protective/caring role
- he subconsciously reinforces their dependency on him to prevent them from leaving/going to others
- sees any interference or intervention abt his behavior as a personal attack
- is a bit of an OCD freak

- Outer isn't all there up in the head
- like not in an airhead kinda way but like in.. a common sense kinda way??
- has no sense of self-preservation
- he was one of the first ones to be introduced to the multiverse stage
- and it shows, he's fucking seen shit
- is very detached from others and their concerns/opinions/conflicts
- dissociates when confronted with something he's uncomfortable with
- is low-key a sociopath
- just allows himself to drift along with the current
- only effort he consistently puts in is to look friendly and not totally apathetic
- will vibe check you

- Horror has all sorts of flavors of PTSD
- hoards all sorts of food and compulsively checks the fridge several times a day
- afraid of loud noises
- starves himself if he thinks there isn't enough for everyone
- short-term memory be a bitch
- has violent episodes where he's mentally back in the famine
- becomes confused/neurotic upon the smell of marrow/blood in "safe" spaces and experiences delusions
- takes it very personally if someone refuses his food/to eat and gets triggered
- feels responsible for the wellbeing of those around him

- Blackberry is bipolar
- covers up his self-hatred by acting like a total ass so ppl will hate him for him
- bad attention is still attention
- stress-based insomnia hits him hard so he's constantly running on fumes
- cannot cry in front of others; he'll lose his fucking mind if he starts to crack
- secretly has an inferiority complex over not being able to teleport or summon gaster blasters like the majority of the sanses can
- mood swings go brrrrrr
- when the stress gets to a breaking point he mentally regresses; he'll be throwing tantrums, fumbling his words and forgetting some entirely, retreating into heavy coats and blankets, and even chewing on his gloves/hands
- has a lot of sexual frustration/repression and has never been laid

- Raspberry has big pick me energy
- a bit of a control freak, if there's even the slightest change to how he likes his home environment, he'll have an episode
- has no social tact whatsoever and is often very blunt and upfront and in your face
- very oblivious to how other people perceive him and is very self-consumed/absorbed
- occasionally gets zoomies when excessively excitable
- has a hard time concentrating on things for long periods of time
- has subconsciously built up delusions to suppress his guilt for the things he's done and pretends everything is okay
- his morals are fucked
- takes comfort in scheduling/routine
- is very dependent on others for a majority of things, he lacks many basic autonomy skills

- Wine really puts the control in control freak
- he has a habit of putting trackers and bugs on everybody
- there is no such thing as privacy with this guy
- not exactly a sociopath but he's definitely somewhat psychotic
- has a very tight hold on his crazy, his self control is actually unreal
- is a pathological liar, and will continue to lie even when he knows you know he's lying to you
- has a compulsion to exert authority over the people he deems his 'friends'
- is casually violent, he will not hesitate to fucking kill a man in broad daylight if they trigger him
- often treats people like objects

- Lust has abandonment issues and suffers from autophobia
- has a tendency to throw himself at people
- is always at the multiversal gathering place bc it's never empty
- uses sex to make people want to keep him around; let himself feel wanted
- absolutely smothers his friends with affection as a way to ensure they don't get bored with him
- his introspection is on fleak but does he care? Nope, still makes consciously bad choices
- drowns his problems and self medicates via lots of masturbation and sex
- definitely a "do as I say, not as I do" kinda person
- bases a lot of his self-confidence on how others perceive or like him
- ADHD hits him like a truck man
- has several different social medias to stalk people

- Dust is a certified schizophrenic
- suffers from hallucinations, both visible and auditory
- drowns himself in alcohol and LV
- often gaslights himself and anyone who tries to help him through it
- experiences delusions when under high stress as a defense mechanism
- is seven feet deep in denial and is still digging yet a deeper grave
- psychosis (in the form of ghost papyrus) be a bitch
- his memories and thought process is a little scattered; often jumping in between the lines or just forgoing them
- has sporiadic insomnia, even going days without sleep
- often 'copes' with sparring
- is constantly under chronic stress
- dissociative identity disorder gets LIT

- Fresh is a sociopath, straight up
- the more sans-based hosts he goes through the more he slowly adapts to accommodate them; meaning he's slowly gaining higher functions he has no idea what to do with
- one of those functions being the capability to empathize/sympathize
- another is the ability to think long term and premeditate
- both mixed together and incomplete make for ONE HELL OF A MESS
- gaslights and man-splains himself
- his behavior grows more and more erratic in sporadic frequencies
- low-key developing a split personality

- Killer be a very high-key yandere
- also it comes to no surprise that he is also a psychopath
- possessive and manipulative of those around him
- encourages the gang's mental instabilities to ensure codependency
- his ego can make Papyrus look humble
- is human-phobic; for all charas/frisks it is on sight/site no hesitation
- takes a lot of pleasure in running others through strenuous mind games
- has difficulty in accepting any form of autonomy
- represses his own emotions as a defense mechanism

- Dream is somewhere on the spectrum I just know it
- very book smart but super dense when it comes to the deeper intricacies of emotions and relationships
- is a pathological liar
- turns a blind eye to people's deeper feelings and suffrage
- disassociates/has panic attacks when confronted with issues he can't easily parse through
- has been groomed to be a people pleaser to the point of self-neglect
- bases his self-confidence on his reputation as a hero/good person
- refuses to face any guilt or blame and deliberately bottles those emotions up
- thinks he knows best for everyone
- is subconsciously naive and refuses to accept anything that contradicts the happy reality he's built in his mind
- struggles with consent/personal space both physically and emotionally

- Ink is a sociopath and is in low-key denial over it
- struggles with reality/fantasy and is in a near constant state of mental unrest
- is often delusional and neurotic but is really good at masking it with the paint
- thinks all the other sanses are fake; sees AU copies as toys, other outcodes and originals as somewhat self-aware chess pieces for the creators and Error being a partner/playmate made specifically for him
- very possessive and controlling over the "storylines" of the multiverse
- claustrophobic bitch
- narcissist to the max; thinks the whole multiverse and everything in it revolves/belongs to him
- is hyperfixated/monomaniacal about Error as he's the only stable/constant thing in his immortal life

- Crop is fucking exhausted bro
- homie has an embarrassingly low self-esteem and his morality is waning from the growing apathy
- thinks the only reason the other Sanses are so nice to him is for the abundance of food his AU supplies and that really makes him sad
- is the mom friend that everyone confides in and he's secretly SICK of it
- he wants to focus more on his own health but has trouble turning others away or he feels guilty/shitty
- low-key emotionally manipulative to get what he wants
- is a violent person when truly mad
- has a gambling problem
- vents his frustrations by subtly stirring up drama in the council and taking it out in passive aggressiveness

- Nightmare has night terrors of the apple incident to this day, he never grew out of it
- takes his anger and frustration out on others and lashes out when vulnerable
- can't tell gaslighting from reality
- will literally shoot himself in the foot before accepting help from others
- has been essentially long-term brainwashed into thinking he's really the living embodiment of everything negative and horrible in the multiverse
- instinctually associates feelings of trust and affection with pain due to how many times he's been stabbed in the back once his guard was down
- gets frequently sick due to his conflicting emotions and stress
- low-key has dissociative identity disorder

- Reaper is depressed asf and nobody can tell me otherwise
- touched starved to the point it ain't even funny he's literally dying inside for the touch of another living thing
- masks his low self-esteem with flirting/puns and generally being a dick
- secretly stows away the souls of ppl he felt close to after they died and keeps them for himself
- stalks anyone who gives him a shred of attention and care
- a chronic workaholic
- a bit of a hoarder
- is not above killing others prematurely to get his way when he's desperate
- finds difficulty in understanding social context, nor can he read a room
- struggles in social confrontations, never manages to say what he really means
- has bad anxiety, sometimes he just gets panic attacks out of the blue

- Cross has been through the fucking wringer and it shows
- his trust issues are chronic at this point, will stab a bitch just for making eye contact
- suffers from auditory hallucinations once in awhile
- bases his self-esteem on the opinions of those he holds in high regards and is desperate for their approval
- panics easily, is almost always an emotional mess, frequently lashes out and often just makes things worse for himself
- has sleep paralysis demons and they are not fun
- often gets wrapped up in his own head and talks to himself/XChara
- kinda OCD and a conditioned perfectionist
- puts on airs to hide it but deep down he's just a scared kid

- Error has all sorts of flavors of psychosis and paranoia
- crashes whenever he's mentally/emotionally overwhelmed
- his haphephobia stems from the constant understimulation he adapted to in the anti-void
- is an attention whore and we stan that
- has intermittent explosive disorder, like big time in the form of tantrums
- is burnt out all of the time and can never catch a break
- super touch-starved and wants friends but doesn't know how to express affection in a healthy way or without accidentally hurting/glitching/killing them
- can be super naïve and deliberately indulges himself in delusions
- is often lost in destructive/violent deliriums with only short periods of clarity

- Dance has crippling performance anxiety
- is kind of low-key a creep
- "nice guy" behavior
- has a hard time accepting boundaries and personal space
- has a victim complex
- has a compulsion to impulsively micromanage every little thing in his surroundings
- suffers from agoraphobia
- kinda neurotic but is really good at masking it, he's mostly harmless
- is super sensitive abt his abilities due to being one of the "weaker Sanses"
- knows more than he lets on, and by that I mean he knows all the shit he shouldn't for his mental health
- got some maladaptive daydreaming up in there
- a little narcoleptic

- Sci is constantly wearing himself ragged as a workaholic
- self prescribes/medicates all sorts of drugs and treatments
- struggles with imposter syndrome
- kind of a megalomaniac in regards to his own intelligence
- has a bit of a problem of enforcing his opinions on others
- his ego is greatly susceptible to the opinions of others and he takes opinions too personally
- easily emotionally manipulated
- the ethics/morality are there but are easily bent and skewed for his convenience
- subconsciously a sadist but we don't talk about that
- ADHD makes him really clumsy and have poor object permanence

- Epic has chronic depression ya'll
- his head ain't screwed on right either, its all scrambled up there
- a little delirious sometimes
- masks his mental instability by behaving unhinged on purpose
- is often going on auto pilot, which can go 50/50 for the wellbeing of those around him
- he gets confused and forgets where/when he is and what he's doing a lot
- struggles with retaining information
- has problems with conforming to social norms and cues, he HAS to oppose the current
- literally cannot sleep for shit, you gotta knock him tf out
- has a drug addiction of some kind I just know it (its probably cannabis)
- somewhat a pathological liar
- is a kleptomaniac
- ADHD be potent in this boy, makes him vibrate 22/7 and the rest are just the regulatory emotional crashes

- G has the biggest ego you will ever fuckin see I swear to God
- man is emotionally drained, basically a DIY sociopath
- his stress has eclipsed his depression
- gets easily bitter/envious and takes it out on his friends
- is slowly developing more emotionally abusive habits and is losing his mind over it
- has frequent temper tantrums and easily gets frustrated when things go wrong
- has a bit of a superiority complex
- covers his emotions up with a charming persona
- takes any hint of concern from others as a personal attack
- dyslexic af

- Geno is absolutely unhinged and really good at hiding it
- the endless resets has made him very detached from reality; the repeating events and conversations he's had has disillusioned him from the sincerity of those around him, making him more self-reliant and prone to shouldering the responsibly of the world on his back
- obsessed with everyone in his life and is overly protective of them
- would have a drinking addiction if he could get his hands on enough booze
- says out of pocket shit on the daily
- his mental health is literally in shambles but he masks it through sheer force of will and determination
- has chronic migraines
- absolutely folds over children, he loves kids and is super soft for them
- secretly wants to either kidnap/keep or kill you there are no in-betweens
- doesn't give the slightest shit about other people's boundaries or their opinions; is convinced he knows best
- is self-aware that he's a lunatic and accepts it
- has contingency plan after contingency plan for his hidden agenda

- Ccino has so many dirty little secrets
- super lonely and needy for intimacy but also fears it as well
- talks to the cats like they're his therapist
- has paraphrenia but nobody has figured it out yet (except Nightmare)
- frequently does little things to punish himself when in a bad mood
- is constantly badgered by self-doubt
- holding his breath wondering when his 13th reason why will show up
- cannot function on his own for long, he needs frequent social interaction
- has a shitty memory and sometimes even forgets his own name
- may or may not have some magical form of Alzheimer's disease
- hates how he looks, especially the soft aesthetic going on that he can't seem to get rid of
- suffers from binge eating disorder
- often gets lost in his hyperfixations to the point of worsening his health

Notes:

Me: *Looks at the Sanses*
Me: I'm going to give you guys so much trauma

Classic: *Looks at the list*
Classic: wait- I'm the most mentally stable on the list???
Me: I know, I'm surprised too

Ink: *Looks at Error*
Ink: *whispers* you're like me
Error: whAt?
Ink: what