So this is an Underswap story with my own take on Chara's personality. I tried to fill in blank spaces the best I could being as the game is incomplete. I also didn't use the full caps of swapSans because I felt it would become an eyesore which as much as talking as he does. Even though the game is incomplete, there are slightly spoilers for the actual game that can be concluded. It's a CharaxSans, AlphysxUndyne and mild tones of PapyrusxAsgore. If these bother anyone, this wouldn't be a fanfic for you. I apologize ahead of time for grammar issues. I also love the fandom calling him Blueberry, so I used it. Undertale belongs to Tony Fox.
My name is Chara and I killed someone. I am a human who fell into an unknown world at the top of Mt. Ebott near my home. I was attacked and saved..but I was scared. A kind and large goat like monster took me into his home and I just wanted to leave. I wasn't..suppose to survive that fall, I didn't want to be here. He wouldn't let me leave. He said I wouldn't understand, he was protecting me. I was scared, I wanted to disappear, he wouldn't let me leave..his large trident came at me, I attacked back...I watched the blood flow from his wounds..I only had a stick..how could he have been so weak...I shouldn't have fought back like he said but...I was only defending myself...he fell to the ground and said he forgave me. He said he was sorry and I was only scared..he apologized for being unable to protect me...his dust covered my sweater and he was gone. I trended my way through the strange world, frog like monsters, giant birds. They terrified me so. Was I actually dead and this was some kind of hell for me? I looked down at the stick in my hand and tossed it to the side, hands shaking. They began to melt in front of my eyes, my feet began to melt to the floor. "In this would it's kill or be killed! Glad you learned quickly, this will make everything a lot easier. Your soul is mine." I cried for help, but no one came. I screamed as I felt my insides melt inside. I wasn't existing. I was disappearing..
"NOOOOOOOOOOOOOOOOOOOO!" Chara sat up on the couch, clenching the blanket tightly that was sweat soaked. "I'm sorry..I'm sorry." She started bawling her eyes out, soaking her sweater sleeves. "Human?!" The bedroom door flew opened and a blue blur ran down the stairs. "I heard you scream! What is the matter?" It was the little knight in training Sans the Magnificent. The adorable little brother of the skeleton bros. She had grown to be close friends with the little sentry. She enjoyed having a friend her age and even his happy attitude was nice to be around. Chara continued to mutter apologies. Sans teared up slightly, climbing on the couch. "Don't cry human! I am here. It is just a dream." Sans hugged the human tightly. He was suppose to capture the said human and take her to Alphys, the royal guard captain and his best friend and trainer, but when Chara refused to fight back, he found that he wanted to be friends with the human. She wasn't very good at his puzzles, but still went out of her way to try and solve them. She apparently was a huge fan of tacos as well. He helped the human become friends with everyone in the underground. She had fought the great Alphys, and by fighting, they mean that they ran away until she almost had a heatstroke. Chara helped her return to her home though and after biting and grinning their way through a set up play date from Sans, found out they actually had a lot in common and started to become friends. Through Alphys, she became friends with her now girlfriend Undyne, the mad scientist of the Hotlands who had helped, and tricked, the poor human through her many puzzles, while being tormented the whole time by the human killing robot star, Nabstabot, the celebrity of the underground TV. She even got to meet the great queen, who was basically mom for everyone in the underground..but there was one person who really loved her there..Temmie...a monster child who somehow had the same powers as her. The ability to reset everything...that she had tried to take her soul...she had no choice but to reset, she was never strong enough to face her.
Each time, she absorbed the human souls and chattered less and less. She almost just enjoyed watching Chara die over and over again. At one point, she had become so distraught that she lost her soul to a wondering spirit. The lost adopted child of the royal family, Frisk. She used her body to cut down monster after monster. Chara looked down at her hands and would see the blood and dust, screaming and unable to make a sound. She was convinced the world would be destroyed had she not came along. The older skeleton brother. A man so lazy yet incredibly smart. He knew of timeline and space distortions. He had is suspicions as they had died out for a while, only to come back again once Chara appeared. She had been the first human in a long time, and it was only when a human was around, that time seemed to distort itself. Papyrus had stopped her, over and over again in the castle, unallowing the human to pass through. Frisk had began to grow weak, doing the fight over and over again..at one point, she watched Papyrus grow tired as Frisk kept trying to fight his way through him. But in this, Frisk had too grown tired, enough for Chara to control her body again. Enough for her to at least, cry her plee. She told Papyrus of different timelines. That they had been friends in most of them. That this was not her, but the fallen human Frisk, the lost child of the throne. Papyrus stared down at the human child as the knife fell from her hands. The older skelly chuckled, telling her that he knew, but it would be hard for him to forgive her for killing everyone..for killing his Sans. Chara said she didn't expect forgiveness, but hoped they would be friends again as she had reset a last time before Frisk could take her body back for her own. She even begged for forgiveness from the monster she killed in the ruins, a kind man named Asgore, who completely had no idea what she was ranting about actually became almost a father figure to her, whenever she wasn't staying at the skelly's house, she was with him..she wish she could stay with him forever. The resets terrified her. Each time, she was forgotten. "Human. Human look at me." Sans grabbed her face, staring at her with bright blue eyes. "It was only a dream. Don't worry! The Magnificent Sans will watch you while you sleep!" "Why?" "Because I am part of the royal guard! It is my job to protect everyone! Even from dreams!" "Sans." Chara continued to cry. "I'm sorry I'm such a cry baby!" She laid her head on his lap, gripping onto his pj pants. Sans started to blush as Chara fell back asleep. He was too good for her.
Sans relaxed and started petting her hair. "what is up Sans?" He turned seeing his tall brother standing there in a sloppy t-shirt with a best big brother worn on it. "The human had a nightmare. But I am here now and will protect her!" Papyrus sighed slightly, leaning over, grabbing his brother's hand off her head. "you shouldn't get close to the human." "But the human is my friend!" "how much do you actually know about her." "I...she..she's nice..." "she's nice cold you mean." "Paps! No puns! That will give me nightmares!" "just be careful little bro." "Aww Paps." He reached his hand out, petting his brothers head. "Don't be jealous. Your still my best brother friend!" Papyrus laughed, brushing his hand off and headed up to bed. He shut his door sighing, listening to Sans talk to sleeping Chrara. "they are too adorable..your making it hard to trust you kid...he's fond of you." The front door flew open the next day. "Where are they?!" Alphys yelled, phone in her hands. Papyrus pointed down beside him, seeing Sans and Chara curled up around eachother sleeping. "Thats so cute!" The guard captain walked over as Papyrus hung up his phone. "pretty adorkable." Alphys frowned, looking up at the older brother as she fixed their blanket around. "Talk about sleeping through a hurricane, I figured I would have woken them up..What's with the look?" Papyrus pulled out a folded up paper from his pocket, holding it out to her. "What's this." "the kid is an artist." "Is this a wedding?" "heh. yeah, check us out." "Am I the one with the triangle head?!" Papyrus snickered, taking a drag from his cig. "she's getting too attached to my brother." "Paps?" "sorry just. you know, with the whole, hunt all the humans for souls stuff. sure, i get the queen's reasons but..i mean..i kinda like the kid too. she's similar to San's age. i can't imagine a whole world after him for his soul." "Papyrus. Your just gonna have to trust your brother. He's actully really tough. I just..don't want to see him hurt either. He's so innocent and kind..look at him I mean, he made friends with the human he was suppose to capture..let alone if he had to kill one." "heh." He rubbed his little brother's head. "Ya just gotta trust her." "see..that's the thing." Papyrus opened his eyes, his one glowed sligthly orange, "i know not too."
Chara awoke to find herself alone on the couch. Her eyes were crusty from the tears of last night and she went to the kitchen to wash her face off. She tensed up as someone came up behind her, placing his hands on the counter. "i found your sketchbook. so, your gonna marry my brother someday?" Chara tensed up as Papyrus leaned over, holding out the picture. "it's not bad. a bit, sketchy." "Papyrus" Chara started to tear up. "your the one who told me not to trust you." "I wanted us to be friends again.." The tall one relaxed some, leaning on top of her head. "I..it.. s.s.. a,..p..picture.." "oh?" "I...I do like Sans a lot. I..don't have any friends where I come from..peculiarly no one close to my age..and he's so good and happy and nice I don't...I don't wanna lose that friendship. Sans is so cool and such and I only wish that..I could..stay..here." Paps spun the kid around moved by her crying face and wiped some tears away. "Kiddo don't cry, humans aren't very absorbent." "I love Sans. You are right. These past months have been amazing since the last re..reset. Since before the one before.. Sans is always making me believe that I have good that..that I know isn't there but." She looked down at the picture. "Y y you can throw it away if you want.." "hey, i'm no art critic besides, i lied." Chara turned red. "What?!" "it's a secret, but why don't you wanna stay then? afraid you'll become planted? you take pretty good care of watering yourself." "I am dirt after all. He so clean and fresh right down to his big old heart." Papyrus stared at the human, tilting his head slightly as she mumbled. "Your all so wonderful and dear to me and I don't deserve it. I'm not a good person. I'm so different from Sans..it's probably why I value his friendship so much. He makes me feel safe and not afraid..like I don't have to hurt anymore." Papyrus grabbed the child's arm, pulling down the sleeve. "heh..i am surprised i never noticed this." He said, staring at the scars on her wrist. Chara pulled it back. "Don't act like you know me either?! I don't come from a happy world like down here. I don't have a family to go back to every night!"
She pushed his arm away. "Temmie isn't completely wrong. It's do what it takes to survive or die on the surface. Everyone is safer down here.. especially once I am gone." Chara stormed from the kitchen, slamming the front door, determined to get as far away from the skeleton as possible. Her feet trended through the snow frustratingly kicking it about and made her way to Waterfall. She loved it in there. The waterfalls were inspirational and she liked to draw the scenes the echo flowers sang about. But today she didn't feel it. The child gripped her wrist tightly. There was a reason that she went to the mountain in the first place. "Hey hey hey." Chara jumped slightly seeing Sans behind her. "What are you doing all the way out here human?!" Chara said nothing as she turned back to the water. "Where do you think the water goes?" He sat down beside her as they stared over the waterfall. "I think it goes to a giant lake where tons of fish people like Undyne live!" Chara laughed. Sans smiled wider. "Do you think they are obsessed with anime too?" Chara asked. "Probably! And they probably have an Alphys best friend too!" "All shapes and sizes." They continued on laughing, the girl forgetting about her encounter with her friends older brother. She had grown close to the wide eyed skeleton. He was everything she wasn't that she could never be strong enough to be. "This is just precious!" They turned to see Nabstabot there, a camera guy behind him. A camera ghost. It was his cousin Happstablook, but everyone called her Blooky. She was famous for her Undernet stories and often wrote the shows for her more musically inclined cousin. "Wowwie! Napstabot! What are you doing out here?!" "Finding my next special! You two are so adorable together And the story! I can see it now, two child draw together by puppy love and rainbows, kept apart by who they are. A forbidden romance between monster and human." "R r romance?!" Sans turned blue, pulling at his bandanna around his neck. "We are just friends. Pals. Chums..uh..other words!" Chara frowned, forgetting that at any time the celebrity could appear in Waterfall. Sure, she liked him and after their fight, even helped him realize how much stardom had gone to his head and wanted to connect back with the common folk.
"Come on. Please let us follow you around for our special!" "Y you don't have permission to use the humans face on TV! Can't you see she's embarrassed! However you can follow me, the Magnificent Sans around as much as you please!" Chara pulled her head down into her sweater. "Nooooo." She muttered and groan. "Ah. Well it's either that or I could turn you in to the queen." "No no! I'll...I'll do it.." "Great! Are you OK holding the camera dude?" "Oh of course." The pink ghost said, determined. Chara frowned, taking out her sketchbook and began drawing. "Oh what are you doing there?" She turned it around and the robot was taken back. "Its you missing your arms again." "Alright maybe we don't need a whole segment but how about we play more on the puppy love. I know a lovely date. Children on dates is a big thing. It is sure to bump my ratings." "Especially with me in it! I have practiced since our last date human!" Chara laughed slightly but unenthused. "OK sans..but no ma.." "Make up! I will not have you on my show looking so sad and drab. We are off to Hotlands dude!" Before she could get away, the strong robotic arms took her away as Sans was unaware of what happened at first then finally caught on, chasing after. Before Chara could really processed what just happened, they we already at NTT resorts. Papyrus has taken her here once before and was a little annoyed she never got to actually eat. "Alright. You are gonna be here. Cameras are there and there and a little one right here. Never look at any of them unless your being dramatic." The celebrity said, fixing up Sans shirt and sleeves. "I should had sent you back as well. But your human is the star!" "What? I though I was." "Honestly neither of you are I am." Nabsta laughed. "Alright act natural. Action. shuu quiet on set, she's about to come out." Chara stood behind them, refusing, her arms crossed. Nabstaot frowned, picking her up and extended his arms putting her in the seat. "A little camera shy is all." He tried to laugh it off but felt the human was gonna give him trouble.
She frowned, pulling accessories from her hair and tossing them on the table, messing her short hair back up. "He..made me wear this." She saw Sans star shaped eyes fixated on her. "W..what." "Blue is my favorite color!" She stared down at the girly blue dress she was wearing and sighed. "I'm feeling a bit blue myself." "Human.." "I hope you don't turn green in envy" "Remind me to punish Papyrus later for being a bad influence!" Chara laughed and it put Sans slightly at ease. "Can..can I talk to you about something? As friends?" "Best friends?" "Best not brother and not teacher friends!" Chara frowned slightly seeing the skeleton fiddling with his gloves. "What." "Ah well...I never wanted to bring it up but..do..do you hate my brother?" "Oo drama, zoom up on his face." The director said moving his cousin slightly forward. "W what makes you say that?" "Well..I know he's a lot older then us, which is why he's lucky to have such a cool dude like me looking after him..but lately..well the past few months you two seem to be..fighting? Or like..more you disagreeing with him a lot and him just smiling. He always smiles, its the one thing he's not lazy at!" Sans exclaimed as a waiter came over. "What can I get for you today." "Do you have tacos?" The girl asked as Sans face started to light up. "Its the favorite food of the magnificent Sans. Making it the best food." "I will go fetch that." The waiter said, obviously annoyed. "Human! You called me the Magnificent Sans! You never had before." "Do you prefer blueberry?" "I love that nickname!" The girl sighed, resting on her elbows, avoiding eye contact. Avoiding looking into the never judging eyes. Eyes that looked at her a way none ever should. "I can't deny it. You are magnificent...I was fighting with your brother because..I..I need to go and I probably won't be coming back." She thought for a second she could see his soul crack. "W what do you mean? Are you going on vacation." "No..I don't think I will ever be able to explain it to you but while I'm around you will never get to the surface, no one ever will." "Well sure they will. If we just go talk to the queen, I bet she would let us open the barrier. Alphys always talks about needing human souls." "It won't happen." "Huh?"
"Look Sans ..your really special to me." She put her hand on top of his just seeing his smile. He was as happy as he could be. "Your pretty content huh?" "Yes. I get to be on TV with my human bestie!" "Sigh. Sans you should forget about me. Your strong and kinda and make everyone around you happy. I don't deserve that same treatment." "Why not. Don't..don't you still wanna be friends." She pulled back. It would break his heart, but if it made his life easier in the future, shed have to. "No. I don't wanna be friends with you." She said sarcastically. A half smile under flowing tears. "Your a goody two shoes and I'm a bad girl. I've killed and hurt people Sans. I steal, I have a pack of your brothers smokes right here I was gonna trade off for my own selfishness. I lie, I'm a cheat, I'm not a good person." "Human.." "Don't look at me like that!" "If..if you were such a bad person, you would have killed me and Alphys and our friends right?" Chara pulled the dress up over her clothes and ran off. "I'm sorry Sans. I hope you understand someday!" "Oh this is gonna kill our ratings..we can edit this right?" His crew nodded muttering among themselves. "Alright. Zoom in on the kid, I wanna catch what happen...hey!" A large bone blocked their path. "What the. Hey! Your messing with my crew!" The taller skeleton walked past, staring at the celebrity, eye glowed slightly. "this special is canceled." He walked over to his brother who just sat at the table, hand on his chest. "hey cool dude. so you were on TV." The brother gave no response and Papyrus put his cig out on the table and knelt over. "Did I do something wrong big brother? was I..not magnificent enough? Why doesn't..she want to be friends anymore..maybe I.." "hey hey bro. where do humans live?" "The surface." "so where do you think the human is going?" "To the surface? But she acted weird when I brought it up.." "so you drew this huh?" Sans looked down at the picture he had interrogated the human about. "Big brother! What were you doing going through her picture book?!" "you like the kid huh?" Sans was bright blue, his eyes blacked out. "you wanna marry the human someday?" "Papyrus!" He grabbed the picture from his brother, folding it up. "little advice little bro. when a girl runs from you crying. you chase after." "Uh...right!" Sans jumped down and ran out of the resort.
He hurried his way to the elevator, pressing the bottoms constantly, despite it not actually making the elevator go any faster. "Please please please move." The doors flew open and he ran. His short little legs were actually quiet fast. He entered the castle garden that stood before the barrier room. The girl stood at the doorway, staring up at the rainbow magical shielding that kept people in and out. Her sweater was covered in dust and blood. "H h human!" She tensed up, turning back slightly and held something behind her back. "Why are you here?" Sans stepped closer, causing her to tense up as he stood feet from her. "I..I know your lieing." The human stared at the guard in training. "You do wanna be friends! We've done so many things together, eating so many tacos..I um..I really like you human!" "Chara." 'What?" "My name is Chara." "Ok Human Chara! Do you have to leave?" "Yes.." "Well. I'm gonna wait for you to come back then!" "What?" "Your gonna come back and visit right?" "You should forget about me..and you know that's hard for me to say. You don't need a bad friend like me." "I think that's my choice to make!" Sans said walking over and hugged the human. "Sans." She kept a hand behind her back and hugged the skeleton with her free arm. "I want to stay so much. But no one will be safe while I'm here. Besides, your gonna be part of the royal guard and your gonna have so many friends. Who would care about one human like me." "I would!" Chara started crying more causing Sans to start crying. "I would miss you and care about you! I..I l l o..o..." The skeleton couldn't get his words out anymore and just kept crying. "Don't cry anymore!" Chara pushed him back. "Alphys would be mad at us." "Right, she doesn't like cry babies into the guard." The skeleton laughed. "Always be yourself Sans. It's one of your best qualities." "Here." He took off his bandanna and wrapped it around her neck. "Now you won't forget about me ok?" Chara placed her hand on it. "But." "I have so many don't worry!" Sans grinned. "Sans.." "Yes." "Please don't forget me! Maybe we will meet again." "I won't!" "Good bye Sans the Magnificent." "Good bye Chara the human." Chara hesitated and hurried off through the barrier. Sans pulled out the folded up picture in his pocket, it was the doodle he stole from Papyrus, taking out a pencil and crossed out the word human and put Chara above it.
"so the kids gone huh?" "Yes." Papyrus walked over. "The Chara human has gone home now. But she will be back. She said so herself." "heh Sans, don't let dames fool you. especially one like her." "What is a dame?" He looked down at his little brothers doodling. "so u really drew that?" "Yes. Chara had so many colored pencils I wanted to use them..I guess I should have removed the picture though." "Sans!? Papyrus?! What are you doing here?" They turned seeing Alphys run into the room. "Don't tell me you guys." "We what Alphys?! What's wrong? Why are you so sweaty?!" "The queen has been killed. Her clothes and crown was found in a pile of dust." Papyrus glared back at the barrier. "She's...on vacation right?" They looked at Sans. "She is the queen and probably needed a break." "He..he doesn't understand does he?! The human betrayed us! She killed our queen..I can't believe ...after all this. I though this human was different!" "C..chara is different." They looked down at Sans. "Who?" "The human. Her name is Chara and she wouldn't hurt anyone right!?" "Sans. You've heard what kind of person she is." "I?" Alphys put her hands on his shoulders. "Your little ..date was live." Wowwie. I was on live tv?! No wonder the human was nervous. Not used to the lime lite like myself myehehe." "You should leave Paps. This is royal guard business. I would hate for them to try and tie you into this." The older skelly sighed. "Its alright. I know a short cut." He lifted up his brother and they vanished from the door. Alphys stared out at the barrier, hands clenched tightly in a fist. "Human..how...how could you..we trusted you..I swear if you ever come back..I will take your soul!" "I would like that too." An errie voice said as she looked back, seeing a strange creature standing there. "Who are.." Alphys scream filled the castle walls.
Chara had made her way down to the orphanage she lived, telling the story about everything that happened...and no one seemed to even care that she had been missing. She knew that if another human fell into the Underground, Temmie would get the soul she needed to take over and destroy everything. No one would help her cover up the hole in the mountain even if it meant having no more children go missing. There her life of crime began that night, stealing shovels and bags of quick drying cement from the near by shops. If no one was gonna help her, she was gonna do it herself. No one would ever fall into Mt. Ebott again if she could help it. If she could do one thing right in her life. Maybe someday, she could be forgiven.
(So in most fanart, swapsans is portrayed a lot younger then original Sans. I don't believe this is true, but for the sake of this fanfic, he starts out smallbones and there will be a time skip, where he's basically normal swapsans. Thanks for reading so far.)