Generic Headcanons (Sanses)
This list includes short bits of information on the various Sanses to be included on this blog. If you’re looking for a specific one, please use CTRL+F to search for the AU, due to the length of this list. Reminder as well that most of this information is entirely headcanon. If there’s canon information that I’ve messed up somewhere on this, please let me know so I can fix it and adjust accordingly!
Please note: When answering asks, I will first list the character being requested in the format of AU!Sans, but the nicknames here are listed because sometimes I drift off while writing and lean towards those names.
Undertale
Nickname/s: Comic, Tale
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: demiboy
Pronouns: he/him
Sexuality: demiromantic / asexual
+ takes a lot of time to like someone at all, usually by default doesn’t trust people
+ isn’t a fan of physical contact, but if someone was to manage to get close to him, he’s incredibly cuddly
+ horrible with directions, will get lost really easily; uses shortcuts to make up for it
character tag
Underswap (original concept by p0pcornpr1nce, who has left the fandom and deleted the content)
Nickname/s: Blue
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: non-binary
Pronouns: he/him
Sexuality: demiromantic / bisexual
+ is a pun connoisseur; will only accept the best puns, anything less is just unacceptable
+ is emotional, but tries to hide it because he feels the need to keep on a strong persona for the sake of everyone else
+ is secretly an incredibly talented writer and has a lot of written works in his room
character tag
Underfell (original concept by Vic the Underfella)
Nickname/s: Red, Fell
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: cisman
Pronouns: he/him
Sexuality: panromantic / pansexual
+ is extremely self-conscious and hides this by acting like as much of a confident asshole as possible
+ crushes incredibly easy due to the lack of caring people he has in his life, but refuses to believe he’s lovable
+ secretly hates cats. doomfanger may or may not be the cause of this
character tag
Underlust (original concept by nsfwshamecave, who has left the fandom.)
Nickname/s: Lust, Lusty
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: demiboy
Pronouns: he/him
Sexuality: biromantic / bisexual
+ is secretly a hopeless romantic, but has yet to meet anyone interested in romance over sex, so he takes what he can get
+ flirts with anything that breathes; has a plethora of horrible pick-up lines
+ has been outside of his own AU and is well-versed in the multiverse
character tag
Xtale (by jakei)
Nickname/s: Cross
Date of Birth: Oct. 10th
Height: 4′9″ / 145 cm
Gender: cisman
Pronouns: he/him
Sexuality: demiromantic / bisexual
+ has difficulty trusting anyone anymore due to the betrayal he’s had in the past
+ he finds comfort in doodling or other art-related things, and can often be found locked away for hours doing so
+ will wear literally anything but his uniform when no one’s around, no matter how stupid it looks
character tag
Ink (by myebi/comyet) (same headcanons apply to Underverse!Ink)
Nickname/s: None
Date of Birth: April 15
Height: 3′9″ / 116 cm
Gender: demiboy
Pronouns: he/him
Sexuality: aromantic / asexual
+ his ink vials’ colors represent: green = comfort/safety, yellow = joy/energy, orange = encouragement/creativity, red = wrath/violence, pink = love/care, purple = lust/attraction, blue = sadness/concern, cyan = calm/relaxed
+ refuses to ever drink his pink or purple vials anymore due to the fact he doesn’t want to mislead people into thinking he cares about them
+ his tastes change based on what emotions he’s feeling/ink he’s drank
character tag
underverse-specific
Pale (by unu-nunu-art/unu-nunium)
Nickname/s: None
Date of Birth: May 26th
Height: 3′9″ / 116 cm
Gender: cisman
Pronouns: he/him
Sexuality: aromantic / asexual
+ clings to people who help him literally only once, because he considers all nice gestures as “Oh, so we’re friends now?”
+ appreciates any and all physical contact and can get a bit nervous if he’s near someone but can’t hug them
+ when he absorbs an AU for emotions, he has even more emotions that Ink does, but it’s far more temporary
character tag
Fresh!Ink (by myebi/comyet)
Nickname/s: None
Date of Birth: ???
Height: 5′0″ / 152 cm
Gender: cisman
Pronouns: he/him
Sexuality: aromantic / asexual
+ is a parasite like Fresh is, but isn’t the same exact one; they exist as separate beings
+ doesn’t ever really drink ink vials, hence why he’s replaced them with his spray cans entirely, which just contain normal pain
+ enjoys making large street-art style murals, but never keeps them, so he places them in hugely inconvenient parts of the multiverse just to annoy people
character tag
Error (by loverofpiggies/CrayonQueen) (same headcanons apply to Underverse!Error)
Nickname/s: None
Date of Birth: April 4th
Height: 5′4″ / 163 cm
Gender: cisman
Pronouns: he/him
Sexuality: demiromantic / demisexual
+ doesn’t trust anyone and would rather just dispose of someone before he gets the chance to even try and trust them
+ has tried to delete his own emotions on several occasions, but concludes he must lose his SOUL to do so, and is too scared he’ll die
+ lacks logic due to the fact that he’s a glitch in a program, meaning he can no longer create logical conclusions
character tag
underverse-specific
Template (by unu-nunu-art/unu-nunium)
Nickname/s: None
Date of Birth: April 3rd
Height: 4′5″ / 135 cm
Gender: cisman
Pronouns: he/him
Sexuality: demiromantic / demisexual
+ constantly does a plethora of redeemable, good things within the multiverse to compensate for the fact he’s an “Error”
+ tries to be more comfortable with things like hugs in order to further distance himself from Error, despite also having haphephobia.
+ unlike Error, remembers his past as Geno a lot more vividly
character tag
Ragnartale (by NaomyMikolMaria) (please note I’m a bit behind on this AU)
Nickname/s: Knight
Date of Birth: ???
Height: 5′5″ / 165 cm
Gender: cisman
Pronouns: he/him
Sexuality: heteroromantic / demisexual
+ doesn’t like using his magic anymore, but can’t exactly remember why it leaves a bad taste in his mouth
+ actively tries to void out his emotions for others’ sake, as he finds his own life far less valuable
+ part of him likes being a monster more than a human, because he thinks he looks horrible now and that more people will leave him alone
character tag
Dusttale (by ask-dusttale)
Nickname/s: Dust, Dusty
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: demiboy
Pronouns: he/him
Sexuality: lithromantic / asexual
+ absolutely despises all humans and it wouldn’t be surprising if he tried to kill any on sight
+ can often be seen talking aloud to “himself,” but he’s actually talking to “Papyrus”
+ has the same observant skills as Sans and is just as quick on his feet if not faster, however he’s also more rash in his decision-making due to his insanity.
character tag
Fresh (by loverofpiggies/CrayonQueen)
Nickname/s: None
Date of Birth: April 20th (pretends it’s April 1st)
Height: 6′3″ / 191 cm
Gender: genderfluid
Pronouns: he/him or they/them
Sexuality: aromantic / asexual
+ while he be default doesn’t have any emotions, if for some reason he starts to feel anything, he will reject it immediately, and become incredibly harsh
+ started dressing in 90′s clothes as a joke, now he enjoys them unironically and has genuinely started watching human 90′s shows
+ sends memes to Error just to piss him off; his favorite to send is Rick Rolls
character tag
Outertale (by 2mi127)
Nickname/s: Outer
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: demiboy
Pronouns: he/him
Sexuality: demiromantic / asexual
+ because he can see the stars all the time, he’s far more fascinated by the Earth’s sun and atmosphere compared to other Sanses
+ has had his jacket since he was a kid but just didn’t bother getting rid of it. that and he never outgrew it. sometimes people still think he’s a kid because of it
+ gets cold easily; his jacket is extremely thick and fuzzy to make up for this
character tag
Altertale (by friisans)
Nickname/s: Guardian
Date of Birth: ???
Height: 4′9″ / 145 cm
Gender: demiboy
Pronouns: he/him
Sexuality: biromantic / demisexual
+ despises his brother so much that he won’t even look in his general direction and will likely burn or destroy anything that reminds him of his brother
+ appears very calm and collected most of the time, but can easily turn around and be manipulative or angry when least expected
+ is horrible at keeping watch of the human children because he always teaches them how to exploit things and they use that against him
character tag
Aftertale (by loverofpiggies/CrayonQueen)
Nickname/s: Geno
Date of Birth: ???
Height: 5′0″ / 152 cm
Gender: demiboy
Pronouns: he/him
Sexuality: demiromantic / demisexual
+ is really bad at social interaction due to extended isolation and because of that may come off as blunt or rude
+ if anyone acts friendly around him, especially if they are a more physical kind of person, he will instantly not trust them
+ seeing spaghetti is a sure way to make him burst into tears, but he’ll pretend he’s not actually crying
character tag
Swapfell (by poptatochisp and community)
Nickname/s: Mal
Date of Birth: ???
Height: 5′3″ / 160 cm
Gender: cisman
Pronouns: he/him
Sexuality: panromantic / demisexual
+ doesn’t do well with people who disagree with him. this will cause genuine unintended arguments over the smallest things
+ very formal in most situations possible, but assumes everyone else should be too
+ is bad at emotions, just, in general. understanding them, having them, everything
character tag
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