Fanfiction from Undertale by Olivia X

“Heya. You’ve been busy, huh?”
Frisk stood at the middle of the Judgement Hall, staring at a dark figure which was Sans. In her hand, she gripped the Real Knife so hard her knuckles were even white and gleaming. She didn’t trust herself to speak just yet.
“So, I’ve got a question for ya. Do you think even the worst person can change? That everyone can be a good person, if they just try?”
Frisk was about to say yes, but bit her tongue. Really? Was that true? She wasn’t even sure who she was herself.
“Heh heh heh heh…all right. Well, here’s a better question. Do you wanna have a bad time? ‘Cause if you take another step forward…you are REALLY not going to like what happens next.
Frisk took a small step forward, knife held in front of her.
“Welp. Sorry, old lady. This is why I never make promises.
Sans stood in front of her, now in his own body instead of just a dark shadow. He wore a grin, but not a kind one. More of an evil, menacing one.
“It’s a beautiful day outside. Birds are singing, flowers are blooming…on days like this, kids like you…”
Suddenly, bones shot out of the ground, but Frisk jumped out of the way. She flew through a wave of bones, and dodged one Gaster Blaster attack after another. She wasn’t hit, not yet. Falling back, she fell down and dropped the knife. Sans’s eye sockets were completely dark now.
“S h o u l d b e b u r n i n g i n h e l l.”
The battle began. “Here we go.”
Frisk lashed forward at Sans, against her will. What was happening? It was like…someone was controlling her. Her every move and action weren’t her own. But Sans dodged easily.
“What? You think I’m just gonna stand there and take it?”
He sent column and column of bones at her, with only a small gap to jump through. Frisk kept her eyes focused on Sans, jumping through every gap without getting hit once. Somehow. Unwillingly, the controller makes her try to slice at the skeleton again, but he only dodged.
“Our reports showed a massive anomaly in the timespace continuum. Timelines jumping left and right, stopping and starting…”
This attack was a series of blue and white bones. She remembered that blue attacks couldn’t hurt her if she didn’t move, so she stood still through those, and jumped over the white bones. She tried to speak, to reach out to Sans. But she couldn’t.
“Until suddenly, everything ends.”
The attack was similar to the second one, but all the gaps between the bones were at different heights. Frisk got hit by one, and fell to the floor, bleeding slightly from her arm. She dropped the knife. She couldn’t. She couldn’t attack Sans anymore, even though she knew that he would dodge all of them. He was her friend. Maybe only in another timeline, but she believed that they could be friends now too. If only her possessor could just disappear. Frisk squeezed her eyes shut and clenched her fists. She refused to attack. But the possessor was too strong. Stronger than her. Before she knew what she was doing, Frisk had picked up the knife again, and lashed out at Sans yet another time.
“Heh heh heh…that’s your fault, isn’t it?”
Frisk wanted to scream. She knew he was talking about the timelines, and what killed her the most was that it was her fault. But not fully. She had to oppose the possessor. That was the only way save both herself and Sans. She managed to survive the attack, which included jumping on platforms over bones, without getting hit. She could feel the horrible urge that she couldn’t counter. Or…could she? Frisk filled her mind with thoughts of the past timeline, where she befriended Sans and Papyrus. She remembered cooking with Papyrus, joking around with Sans, Sans stacking hotdogs on her head, Sans’s horrible but hilarious puns….
“NO!” Frisk screamed.
The knife was thrown on the marble floor. It fell with a clatter. She slowly knelt down onto the floor, shaking, hands covering her face. She couldn’t fight, she wouldn’t. But…she had to. Sans seemed to be a bit taken aback at this, but he readied another Gaster Blaster. Frisk raised her head slowly. Then, the Gaster Blaster blasted right at her. But she didn’t die. Instead, she simply bent down and calmly retrieved the knife. She could feel a smile growing on her face. The gray smoke from the Blaster faded, and she smiled. But now, her possessor had gained full control over her. Her hair wasn’t brown anymore. They were dark red, the color of rust. Her eyes weren’t brown anymore either. They were blood red. She now wore a green and yellow striped shirt, brown pants, and brown shoes. Her name wasn’t Frisk anymore. She was Chara.
With a wide grin, she sliced at Sans. He seemed to be surprised, almost…scared.
“Y-you can’t understand how this feels.”
This attack was similar to the one before, and Chara survived it without getting hit once, eyes still fixed on Sans, and grin still wide on her face. Unblinking, she sliced at Sans again.
“Knowing t-that one day, without any warning…it’s all going to be reset. “
Chara didn’t care about resets or anything. Right now, she was focused on one thing, and one thing alone. Killing Sans.
After a couple more attacks, Sans seemed to be sweating. Tiring.
“Ugh…that being said…you, uh, really like swinging that thing around, huh? …listen. I know you didn’t answer me before, but…somewhere in there. I can feel it. There’s a glimmer of a good person inside of you. The memory of someone who once wanted to do the right thing. Someone who, in another time, might have even been…a friend? C’mon, buddy. Do you remember me? Please, if you’re listening…let’s forget all of this, ok? Just lay down your weapon, and…well, my job will be a lot easier.”
Chara’s form seemed to flash. For a split second, she turned back into Frisk. But ultimately, Chara took over again. With no hesitation at all, she lashed out again at Sans, smile never fading from her face.
“Welp, it was worth a shot. Guess you like doing things the hard way, huh?”
After about a dozen attacks, Sans seemed to be really, really tired.
“Huff…puff…all right. That’s it. It’s time for my special attack. Are you ready? Here goes nothing.”
Chara stood alert, knife held in front of her, completely still. Not shaking or even blinking.
“Yep. That’s right. It’s literally nothing. And it’s not going to be anything, either. Heh heh heh…ya get it? I know I can’t beat you. One of your turns…you’re just gonna kill me. So, uh. I’ve decided…it’s not gonna BE your turn. Ever. I’m just gonna keep having MY turn until you give up. Even if it means we have to stand here until the end of time. Capiche?”
Chara didn’t move. She desperately wanted to attack something, but she had to wait.
“You’ll get bored here. If you haven’t gotten bored already, I mean. And then, you’ll finally quit.”
Chara was bored. Really bored. But Sans didn’t need to know that. He said a few more lines of dialogue that she didn’t pay much attention to at all. She could see the skeleton getting more and more tired. Finally, his eyes closed, and he began to snore. A huge smile spread across Chara’s face, and she raised her knife. Perfect.
Silently, she tiptoed until she was right in front of Sans. With a quick swipe of the arm, she swiped her knife at Sans, but he awoke and dodged.
“Heh, didja really think you be able-“
With another slice, Chara finally got him. But right after she hit him, she squeezed her eyes shut. For a moment, she turned back into Frisk yet again. Tears welled up in her brown eyes when she saw what she had done. She dropped the knife onto the floor again, blood splattering against the ground. She looked at Sans, whose life was slowly fading away. Tears fell down her cheeks as she wrapped her arms around him, not minding the blood. Frisk cried harder and harder, burying her face in his soft, blue jacket

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