AU Sans x Reader Oneshots

Killer!Sans x Reader

Art by Lunnar-Chan
Requested by @JanieRusselltheantic
Story helper: @Jocelyn_Clark

You sighed. Another lonely day. You lived in an pacifist undertale AU. Though, the Sans here hated you. See, your special because of your soul. Your soul is rare, Fear. Fear is an uncommon soul trait. You can't be born with it, but you can create it from a Bravery soul.  You couldn't control your powers, sometimes you can strike fear into someone's soul. You did it to the Frisk here on accident. Sans...didn't like that. You lived in waterfall away from everyone. Sometimes you visit Nabtsablook but that's not often. You sighed again. Walking through waterfall the echo flowers glowed their neon blue. The soft blue-ish grass crunched softly beneath your feet. The rivers of dark water rushed beside you. Your soul ached. 'Why me?' It's not like you wanted this. It's not like you wanted to strike fear into monsters. Sigh. Following pathways you finally reached your small house. Your small log cabin made from winter spruce trees out in Snowdin. It wasn't very big, but enough for one person.

You walked into your small, comfy cabin. Changing into your pajamas you slid into bed. You yawned and quietly wished for your dreams to come true. True love, someone who wasn't affected by your fear.  You layed your head on your pillow,  you sighed for the third time that night and fell asleep.

"Shh! You'll wake her up!"

"It's not my fault your so loud Dust!"

"Can you shut up?!"

"You shut up!"

Your head ached. You swore you could hear voices from above you. Did you die and go to heaven or something? You opened your eyes groggily. You noticed you weren't in bed, you were up, sitting against your wall. You tried moving your limbs but realized you couldn't move. Your hands were tied behind your back and your legs were tied at the ankles. Once your eyes opened fully you took in what was happening. Two skeletons stood in front of you. They both looked like Sans? One had his grey hood over his head, a red scarf with holes in it, and a bone with a sharpened end in his hand. The skeleton beside him had black liquid pouring out his eye sockets and down his skull. A red, target looking soul hovered in front of his chest. He held a knife in his hand. Both skeletons looked at you in curiosity.

"I don't believe I've ever seen a human like this in Undertale" said the one with liquid coming out of his eyes. Which you nicknamed Target.  The one in the hood, which you nicknamed Hood, shrugged.  Target pointed his knife at you. "Who are you?" He said. You choked out your name, "Y-y/n"

"Y/n huh?" He said in a weird tone. "What are you? An AU traveler?" He asked. You shook your head. "No...I live here! I've always lived here! I've never had a way to travel AUs!" You sqeuaked. Yes, you knew about the AUs. You didn't know any of the characters though or any specific AUs.

You got more nervous as he scrapped the tip of his knife under your chin. Blood dripped onto your clothes. 'Oh no' you thought, the more nervous or scared you were the more you couldn't control your power. A dull orange spear appeared above you. Target and Hood stood back in shock.  The spear lunged at Hood. The spear hit him in soul. He fell to the ground, clutching his chest. He looked back at you. Pure FEAR in his eyes. He crawled farther away from you. Target looked at you. Your eyes were wide and full of regret and worry. Something sparked in you that he liked. Nightmare would like to see this. He chuckled, catching your attention. "Your something aren't ya?" He said with a sly grin. You tried to get away but he pulled you by the arm, forcing you to look at him. "Hey hey, I won't hurt ya. Just be a good human and listen to me and Dust" he said as he gestures to Hood in the corner. Your eyes wandered back to Target. He looked at you and smiled mischievously.  "You can call me Killer" you gave a small nod. Killer let go of your arm. You looked at Dust in the corner, he seemed to be back in his normal state, he glared daggers at you. You stepped back subconsciously.  "Tsk. Why do you want her?" Dust complained. "Didn't you see what she did to you? She obviously doesn't know how to control it. If we teach her how to use her powers, this will come in handy for us and Nightmare" Killer grinned wickedly as he said that. Dust thought about it for a moment and shrugged. "Sure, you have a point"  he said as he looked you over. Killer's smile grew as he grabbed you by the hand. "Well come on then! We don't wanna keep boss waitin'!"  Your mind was still trying to process what was going on before you were thrown into a portal. The portal lead to a big castle. You were inside the throne room. The walls were tall, a white carpet with splotches of blood on it lead to a massive throne, sitting on the throne was the one and only Nightmare. You shivered. He wore the same thing as the other except every part of it was covered in a black substance. Skull to toe, even his clothing. You overheard Sans one time talking about him, and let me tell you, what you heard was not nice. "Boss! Look what we found" Said killer from behind you. His iron grip on your shoulder was threatening. 'Run away. I dare you' it said, causing you to shiver. "A frail human" Nightmare said coldly. "Not just any human!" Killer chuckled as he said this. "A fear soul human" he said mischievously. Nightmare raised an eyebrow. "She scared the crap out of Dust!" He said, chuckling at the end. "Hey! That wasn't funny! She has some serious power! I dare you to let her do that to you!" He said, raising his fists. Nightmare rolled his eyes and slapped both in the back of their skulls with his tentacles. His tentacles whipped around in the air or hung limp on the throne. "...Throw her in the dungeon. I want you to tell me what she did to Dust after" the goopy skeleton said. Killer nodded and pushed you  forward into a hall.