#undertwin

WIP #1 of the Fellswap-Rose Gold Termination Squad

Smooth Line Art [With Costume/Outfit Concept Sketches for them]

(I made this with some help from @redtomatofan )

[[I’m going to give separate info for the stuff they both do together and the stuff that they do independently; their personal hobbies and stuff💠 Strap in this gets a little wordy✨]]

Both of them are absolute puzzle lovers, they both love creating and designing new puzzles, traps, mazes, etc., you name it! Its mostly because of the fact that they’re incredibly intelligent, its just that however they’re just wa~y too nice and forgiving… Also don’t think for a second that just because there’s two of them, that they’re not going to join the Royal Guard, actually in fact because there are 2 of them Undyne has twice the work cut out for her💦 She still teaches them how fight so they can defend themselves but for the most part she just teaches them how to cook (very poorly, I might add), so that way they can have more personal life skills they can use to take care of themselves and Sans. But that’s mostly because Undyne can’t bring herself to induct them into the Royal Guard, for 2 BIG reasons; 1) Since she knows that, because of how nice they are, that they’ll try to befriend everybody and even if they can’t they’ll somehow figure out how to convince everyone to stop fighting (or get mauled to death trying to stop everyone from fighting). 2) Sans… He’s her second reason, because she knows that if anything bad happens to them on her watch, she’s a goner…

Both of them can somewhat see into the timelines, but just not with the same clarity as Sans. They get like glimpses and visions, some of which are intertwined with their danger-sense (which is why they’re ATK/DEF, changes in the Neutral/Genocide routes). They also can summon Gaster Blasters, but sadly they’re not quite as powerful as Sans’ are (but that only reason behind that huge power gap is because of his Karmic Retribution ability, if he didn’t have that ability, they’re blasters would have a power yeild that would be a little closer to Sans’, but not quite there, close but not the same), plus they have a weird and innate ability to slightly defy the laws of physics or at the very least figure out how to make it work to their advantage??? But even though they may be similar in a sense, it doesn’t mean they’re exactly the same. So here’s where their differences come into play♥

{{-Papyrus/Bunny/Bunnie: The oldest of the twins (by a couple of minutes) and the more confident/outspoken of the two, despite their name sake. [Distinguishing items: Loves the Bedtime Story “Fluffy Bunny” and wears a pair of Magically-powered Animatronic Rabbit ears with a matching tail that can be worn around the waist; Designed by Alphys]}} Bunnie’s prefered type of puzzles are 3D based puzzles, for example; mazes, switch based puzzles, traps, etc., you name it! This also couples well with their artistic abilities, for they enjoy sculpting, so they usually make a lot of 3D model mockups of all of the puzzles (with concept sketches made by Kitten) that they want to create and try out on all of the other monsters (Bunnie would ask Kitten and Sans for help with testing their puzzles. But they know that 3D puzzles aren’t Kitty’s strong suit and they know that Sans is just a bit too lazy to do a puzzle that involves exercise, but in the end they’ll usually find their puzzle with a “good work” style message written in comic sans♥).

Bunnie’s a talker, they can sit for hours just rambling on and on talking a monster’s ears off, but because of this it makes it slightly difficult for Bunnie to make new friends because of this. Luckily, they’ve got Kitty and Sans, who will take the time to remind Bunnie that they need to sometimes be more considerate of other monsters and sometimes let other monsters speak their minds.

Bunnie immediately took interest in cooking with Undyne, Unlike Kitten who prefers just drawing, Bunnie absolutely got swept up in Undyne’s passion in the kitchen! They would be so enthralled by each other’s fiery energy, that they’d just absolutely get caught up in the heat of the moment! Even up until the point where Undyne’s house burns down… Again…

Bunnie’s ability to manipulate the laws of physics, allows for them to be able to manipulate the amount of gravity their bodies are subject to. Meaning that they can manipulate the height of their jumps, the distance as well, they can also fall from almost any height with only a little to no damage, along with manipulating their body weight, to the point where they could almost fly, almost… Because of this, they’re able to leap over other monsters, jump and flip out of windows in a single bound, etc., though they only really do this so that way they can up their “cool” factor, as they think it makes them look a bit more like Undyne✨

Though while, yes they can also summon Gaster Blasters (which usually are stolen by the Annoying Dog), Bunnie’s act likes puppies and are very excitable and love meeting other monsters, though they have to teach them not to blast everything, but thankfully Sans and Kitten are there to help out.💠

Papirus/Kitty/Kitten: The youngest of the twins (by a couple of minutes) and is the shyer/more reserved one of the two, despite their name sake. [Distinguishing items: Loves the Bedtime Story “Fuzzy Kitten” and wears a pair of Magically-powered Animatronic Cat ears with a matching tail that can be worn around the waist; Designed by Alphys] Kitten’s prefered type of puzzles (vs Bunnie’s) are patterned based, for example; piece together the picture type puzzles, 2D mazes (on paper), Junior Jumble, color tiles based puzzles, pattern switching puzzles, etc., you name it. This also couples well with their artistic abilities, for they enjoy drawing, so they usually make a lot of concept sketches of all of the puzzles that both Bunnie and themselves want to create and try out on all of the other monsters (Kitten, like Bunnie, would test them out on other monsters, but sadly Kitten’s a little too shy to ask for another monster’s input. So they usually ask Bunnie and Sans for help with designing/building their puzzles. But again Kitty knows that pattern based puzzles aren’t Bunnie’s strong suit and sometimes feels guilty for waking Sans up for his opinion since they know he doesn’t get much sleep thanks to his nightmares. But then they’ll usually find their puzzle solved with a “good work” style message written in comic sans♥).

Kitty’s a really good listener, they can sit for hours listening to someone ramble on and on, but because of this it makes it slightly difficult for Kitten to get a word in edgewise, which lead to them being stuck in conversations with topics (or people) they don’t like/are uncomfortable with. Luckily, they’ve got Bunnie and Sans, who will take the time to remind them that they need to sometimes be more assertive and let other monsters know how they feel.

Contrary to Bunnie’s interest in cooking with Undyne, Kitten prefers to draw, doodle and design things for their friends and family. But that doesn’t mean Kitty doesn’t enjoy watching and sketching Bunnie’s and Undyne’s expressions as they just absolutely get into the heat of the moment! Even up until the point where Undyne’s house burns down… Again… Though luckily, because Kitty’s on the sidelines they’re the first ones to notice that everything is going to catch fire so that way they can get everyone out to safety!💠

Kitten’s ability to manipulate the laws of physics, allows for them to be able to manipulate the rate of their decent, how quickly they can move across a surface/manipulate the amount of friction their body gets subjected to, along with their body weight, to the point where they could almost fly, almost… (Just like Bunnie, but not quite) They’re able to leap over other monsters, jump and flip out of windows in a single bound, etc., though however they’re able to do flips and tricks wa~y more skillfully & gracefully than Bunnie can. But that’s mostly because Bunnie goes more for the “superhero” feel, while Kitten goes more for the “prima ballerina/magical girl” vibe. [For an example of this for Kitten—> https://youtu.be/yOrfhH77ynY]

Chapters: 10/? Fandom: Undertale (Video Game) Rating: Explicit Warnings: Creator Chose Not To Use Archive Warnings, Graphic Depictions Of Violence, Rape/Non-Con Relationships: Papyrus/Sans (Undertale), Papyrus & Sans (Undertale) Characters: Papyrus (Undertale), Sans (Undertale), Alphys (Undertale), Grillby (Undertale), Undyne (Undertale), Original Undertale Character(s), Original Female Character(s), Frisk (Undertale) Additional Tags: Underswap Papyrus (Undertale), Underswap Sans (Undertale), Underfell Papyrus (Undertale), Underfell Sans (Undertale), Swapfell Papyrus (Undertale), Swapfell Sans (Undertale), Horrortale Papyrus (Undertale), Horrortale Sans (Undertale), Alternate Universe - Underswap (Undertale), Alternate Universe - Underfell (Undertale), Alternate Universe - Swapfell (Undertale), Alternate Universe - Horrortale (Undertale), Twins, Alternate Universe - Twins, Younger Brother Papyrus (Undertale), Somnophilia, Non-Consensual Somnophilia, Dubious Consent, Non-Consensual Touching, Insomnia, Sleep Sex, Sleep Groping, Ecto-Tentacles (Undertale), Ecto-Genitalia (Undertale), Ecto-Penis (Undertale), Ecto-Tongue (Undertale), Ecto-Vagina (Undertale), Tentacle Sex, Tentacle Rape, Body Worship, Water Sex, Shower Sex, fellswap, Alternate Universe - Fellswap (Undertale), Fellswap Papyrus - Freeform, Vaginal Fingering, Fingerfucking, Challenge: Misleading the Masses, Slight Hentai-based Plotlines, Mutual Pining, Mutually Unrequited, Adult Frisk (Undertale), Male Frisk (Undertale), Romantic Rival Frisk, Pacifist Frisk (Undertale), Alternate Universe - Canon Divergence, Slow Burn, Slow Build, Slow To Update, Alternate Universe - Stripper/Exotic Dancer Summary:

Some good old Twins!AU "Fontcest"♥ As each of their respective universe "Sans" trying not to lose their shit around their adorable younger sibling(s)♥✨

O~h the humanity!♥✨