Undertale X Reader

(Y/N)'s Backstory...

The year is 200x

You were born and your parents held your in their arms "Oh...Look at him...He's got your eyes." Your mother cried as your father rubbed your weak little head "He's so tiny...Heh...We did good honey. We did real good." You held onto your father's finger as he gasped in a moment of shock "Oh look at that! We need to give him a name! How about grabby..." Your mother chuckled as she grabbed a piece of paper "No because then he'd just be bullied in school." She looked at a list of names "How about...(Y/N)?" Your father snickered "No way..." "But that's the only name on the list." She showed him the list as he looked down towards you "Well (Y/N) is a nice name now I think about it...(Y/N) (L/N)...Actually sounds better with the last name in there."


The year is 20XX.

You were now 15 and playing with your Boxer Dog Puppy. "OOHHH Jaboota boom boo can goo ba loo!" You made random noises while tickling and petting your dog because you just loved her so much "(Y/N)." You turned to your younger sister "Yeaaaaahhh?" "Mom said we need to go." You got up "Why?" "She told me...Uh...She...Wanted me to tell you that bad men are coming for me so we need to go." You picked up the puppy and went to your room, Knowing this could only mean death you packed everything "Bark! Bark bork!" You smiled at the puppy as you put your backpack on and carried the pup in your arms as you ran outside to see a Warzone! Your dad had a yellow soul so he shot down the men with a yellow glowing revolver as your mother had a dark blue soul so she used dancing skills to fight off the men as one of them tried to shoot your puppy! You turned and shielded the dog with your back but then you heard a *Tink* You turned to see your sister created a shield with her rainbow soul "Sis...?" You gazed at her as she held your finger "Come on! C-come on we gotta go!" You ran with the puppy in your arms 

The year is now 20XX

You're 18 and your sister is 10. Your puppy was still pretty small and around their teenage years. You were hiding in an alleyway away from the men searching for all people on the side of the monsters, Your parents were on the side of supporting monsters so when the war started...You had to go into hiding "Sis...The mountain." You looked to your right to see Mt Ebott "Where the monsters live! We can- W-we can go a-and get safe there!" You nodded! You were so close to safety! You were suddenly pinned down by a military guy, Your sister was on the other side of the road and at the foot of the mountain "You're the brother to (Sister/Name) (L/N)! Tell us where she is!" You were slapped across the head with a gun as your head begun to bleed "I don't know who you're talking about..." You groaned as a whimper from your dog came from under you, Violently...The man pulled the dog out from under you "No...No NO DON'T IT'S JUST A BABY!!" He held the gun to the head of the dog as it's eyes stared into yours "Tell us..." You tried to get up as you let out an agonising plead "DON'T PLEASE JUST FUCKING DON'T THE DOG DIDN'T DO ANYTHING!-" *Bang!*


The year...Is 20XX

You're 19 and your sister is missing...Your working for the military as a trainee in soul magic. You had a brown soul which was a unique one that allowed you to summon and use any weapon you pleased as well as the ability to absorb other people's souls. Your partner in battle was Jessie Beck who in the future would become your girlfriend. You sat down at a bench in your vest and baggy military trousers with your military shirt and hat laid to your left as a space was next to your right. You ate from a can as Jessie sat next to you "Hey...So partner uhh...What's the plan? We're in the push position so we have to cut through large amounts of monsters." "I don't have one. I plan to run in and let them either kill me or accept me to my side, If you wanna kill me before I betray you now's the time." She sighed and took off her military jacket revealing a bit of a bust under the jacket, She had a black vest on which was the same as yours "You're acting like your world is gonna end but it probably is if you keep acting like this. All we gotta do is push them back into the underground to seal them up! We don't want to kill ALL of them." "My dog wasn't a monster." You crushed the can in your hand and then flattened it with your hands "Killed her easy enough..." You threw it like a disc into the ground as it stuck itself in "They killed my sister...And they took me here by force." Jessie looked down at the disc as you stomped the disc into the ground "I dunno if my sister is alive or not...She hopefully made it to the mountain." She looked closely at your face as you looked at her "Your the brother of (S/N) (L/N) right?" You nodded as she moved back "Huuhh...Well she's still alive. Reports say she was running around the city like she was looking for something. Now it all lines up. She was looking for you." You chuckled "She's still ten...11 next month." 

The year is now 20XX


It's the year the monster war ends and where your journey begins...You're 19 and your birthday is tomorrow as Jessie and You started dating. "So...(Y/N) We've seen your sister searching around the city." You nodded slowly "I know sir." "We plan to lure her in with you as bait so we have this all planned out." Little did they know, You also had a plan. You'd take your sister and run and hide. Since the others would be in cover you'd be able to escape and hopefully bring Jessie "So we're setting you and Jessie up with Prisoner outfits and you'll walk out looking like you 2 escaped." You nodded and saluted.

The city was empty. You ran out into the open street holding Jessie's hand "We're away...We're away we're safe!" You 2 shared a quick kiss of a bit of actual celebration and excitement. "We need to find my sister she's-" "Here..!" She walked out with 2 monsters beside her "I'm here! B-brother!!" She ran over as you 2 hugged each other...Quickly whispering to her that you need to be ready to run "O-okay..." She whispered as you picked her up "RUN!" You ran down the alley and towards Mt Ebott! Susie followed behind as you made it to the battle field where the trenches and fields of fighting were "We're almost there! We got them!" "Oh my god that was so exciting! I tell you (Y/N) when we get out of this you're getting head for a week!" Jessie exclaimed as you blushed "Not around my sister." You continued running when you were shot in the foot and dropped your sister. The situation all too familiar "JESSIE RUN! TAKE (S/N) AND RUN!" You tried to stand but were shot multiple times in your legs. Jessie ran away with (S/N).


You were tied up in a carriage...unconscious as you rode to the top of Mt Ebott "Hey...You!" You slowly looked over to a bearded man with blonde hair "Finally awake..." You looked around "Why are we going up the mountain?!" He looked forward "The dump. After the humans won the war they decided to use this entrance to the mountain as a dump for all who come up here...But I think it's time you really woke up...Before they kill Susie." You woke up...For real this time. Looking around you were tied up and held at the edge of a cliff and into it was a never ending hole "...W-what...?" It was 5:00 am. The commander held a gun to your head "(Y/N)!" You heard Jessie shout as you looked behind you to see Jessie and (S/N) tied up at a wooden poll with wood at the bottom and one man holding a burning stick "No...No no no not again! W-w...where?" "Are you? Mt Ebott...We won...We sealed the monsters underground! Now we just have to wait for the sun to rise..." You looked back at the commander "...Why?" "To give you a happy birthday."

The commander gently sung Happy Birthday as he cocked the gun and held it to the back of your head "Happy biiiirrthhdaayyy toooo...You." *Bang!*

"We're alive...?"

"Sorta...This guy seems to have our soul. It was brown now it's red."

"Oh...He's kinda handsome."

"Yeah well we're connected to him. We're gonna need to heal him a bit. Looks like he was almost shot but something protected him." 

"Yeah I'll give him a piece of Pie from our last save file." 

*(Y/N)'s HP was restored*

You seemed to have not aged at all...You laid on that bed of flowers for a few years as your body eventually got covered up by flowers. During that time 6 humans fell down including Frisk and Chara who both died and their soul transferred over to you. 

The year is 20XX...

There you were...Laying on a flower bed and above you was a light that you seemed to have come from. You remember little of how you got down here or where you are but the one thing you did know was to continue onward "Weird. Must've hit my head hard if I can't remember anything except my name..."