(Chara is a horrible human being and so there of course will be swearing. Seriously though, die in a fire Chara.)

Chara

I feel the hybrid girl in the back of my new mind, she's locked in a cage that she cannot open. The fat bag of bones is staring directly at me, tears in his eyes, I decide to tease him a little. My right arm lifts slowly towards his face, he grabs it and puts it onto his wet cheekbone. He's gotten weak.

"don't leave me kid..."

"I..."

He leans down closer so that he can hear my words, I grab the knife the girl had dropped earlier while he isn't watching.

"I... she already has."

Before i'm able to swipe i'm thrown to the other side of the long hallway with a blue aura surrounding me. Ooh how i've missed this!

"SANS!"

"chara, let her go."

"He he... you'd like that wouldn't you?"

His grip on me gets stronger but he can't kill me this time, not without killing her forever.

"Can't kill me again, can you?"

It gets stronger again, but if he gets any stronger my lungs will collapse and we'll both die. I look over to Frisk and flash him a smile.

"Weird seeing the possesion isn't it Frisk?"

"Let her go!"

His small voice makes me laugh, it had sounded so much louder when I was possessing him! The blue aura fades and I land back onto solid ground. Seeing everyone together again... gives me the determination to kill them all over again! Then there's also two more monsters and another human soul to destroy as well! With Gaster the closest I run towards him but a shot of purple energy pushes me off the railing and down to the bottom floor, father like son huh? I stand as Toriel is the first down the stairs. She shoots fire at me but I easily dodge her and I slash my knife, she's pulled backwards which makes her only just miss my swing. I'm again pushed away but with the blue aura again.

"are you alright toriel!?!"

"I'm fine Sans."

"good."

His left eye flares up with a blue fire, the picture of so many perfect resets. He snarls as he must know what i'm remembering right now.

"Do you miss the good ol' times Sans?"

"where i killed you hundreds of times!?!"

"Nah. When I killed Papyrus hundreds of times."

His aura releases me and I run at him to try a slash. He teleports as I slash, slash, slash, slash! He just keeps moving! It seems to be taking longer to make him tired, he must have actually done something with his stupid little life!

"you ready to get dunked on?"

"HA! You know that you can't kill me! We share the same body, the same soul!"

"same body, sure. but she has her own soul."

"Keep believing that and you may live a few seconds longer."

More slashing, more teleporting, even more slashing, twice the number of teleporting... none of the others have dared to enter our fight, afraid to get in either of our ways. Our fight seems to be going on for hours, just like the old times.

"Leave him alone."

The voice distracts me a moment and I falter when I take a swing at the fat bones, he seems to notice. Just shut up! Your no longer in charge! You never were!

"Keep thinking that, and you may stay in charge for a millisecond longer."

Thinking your funny huh? Copying my own words!?! Well it ain't funny! It was worse than fat bones' stupid ass puns! Another slash, another teleport. This is getting old now. As I slash again I run through the area he once stood and headed for the stairs, right where Papyrus was standing. His orange scarf was the cause of so many nightmares for fat bones, I want to see another. He's right there, only a foot away, and I slash with all my might. His eye sockets close as he waits for the impact and I hear a scream from behind me, my smile grows so much wider! But... where's the dust? Where is the beating of a lifetime from fat bones!?! He's still standing there, my knife had missed him! I slash again, it seems to somehow go through him!

"I rule me Chara, and you will not hurt my friends!"

"NO! NO! NO! NO! I AM STABBING YOU JUST AS I DID SO MANY TIMES BEFORE!!"

I continue to slash through him, he's like Nabstablook when I had tried to kill him! 

"Why. Isn't. This. WORKING!"

I hear a small chuckle from behind me, I turn to see the smiling face of fat bones.

"duska's stronger than you thought."

"Oh yeah!?!"

I aim the knife for her heart.

"Can she survive this!?!"

I plunge it in. Deep. I smile as the world begins to go black, no reset, no save to bring me back. But it's not there for her either. I watch as the once smiling face of Sans changes to regret, he killed her.

"Go to... hell..."

Sans

She falls right into Papyrus' arms, the knife is sticking out of her chest.

"no. no. no. nonononononono!"

I run up to where Papyrus was laying her down gently, orange tears where clearly visible in his eye sockets. I can't talk, I probably have tears streaming down my skull right now. Everyone steps back as I hold her hand, she can't die. She can't.

"you can't die. please!"

Her arm was twitching slightly, was it normal in human deaths? It felt like something was moving through her- holy shit she's still alive! I begin pumping magic into her through her hand, please be right. Please be right!

"SANS? I'M SORRY BUT-"

"she's still alive papyrus! something is still moving inside her arm!"

He continues to just stand there as I push more and more magic into her, he must think that i'm just mourning. Tears hit her blood soaked clothing, being absorbed into the fabric slower than it should. I'm becoming tired and spots appear in my vision.

"Sans..."

"no."

"Come o-on S-sans..."

"no..."

"Hey Sans! She's gone alright!?! DUSKA IS GONE AND YOU CAN'T BRING HER BACK!"

"no!"

I use the remainder of my magic to throw Undyne across the room, she hits the wall but not strong enough to do any damage to her. I fall to my hands and knees, tears stream uncontrollably from my eye sockets.

"SANS... LET'S GO."

"no!"

"COME ON BROTHER."

"no!"

Despite my objections he picks me up and carries me towards the door, leaving her alone just below the stairs. I begin hitting Papyrus' back and yelling incoherently as we get further and further away from her poor body, i'm too weak to do any real damage to him.

"Sa..."

"no-o-o-o...!!"

I'm going insane, her voice is hearable as if she's talking from her body. The door handle had melted a bit during the battle and it's taking a while to open.

"... San..."

"wh-h-h-y...!?!"

Frisk can't reset to bring her back, no more saves, no more Duska. I had loved Toriel at one point but that was more like a friendly crush, not the hurtful love I feel for the now deceased hybrid. Loud sobs escape me but I don't care, I no longer care.

"... Sans... i'm..."

She can't be dead! She was worth living through all of those resets! I would live through them a thousand times over again if I can only see her two mis-coloured eyes again.

"... where's the... mistletoe..."

Why the hell am I thinking about mistletoe!?! I look up at her body, her left hand is waving at me.

"duska!!"

I push myself off of Papyrus and run back over to Duska. Her hand grasps my own and I hold onto it tightly, never letting go again.

"BROTHER..."

"she's alive! can't you see her moving!?!"

They all slowly walk towards us but I hear the gasps as they see her hand squeezing mine. I laugh insanely as I pull her into a hug.

"holy shit! why... stop doing that!"

"... Not my... fault..."

"Duska!! How the hell are you ALIVE!?! You were stabbed. In. The. HEART!"

"... Doesn't... know... left... righ-t..."

Really? Chara, with all of that LOVE she mustered up never knew the difference from her left and right? Wait... how does that explain how she's alive.

"Heh... heh..."

She coughs from laughing and I help her to her side, god I feel horrible right now.

"... Heart... is on... left... side..."

The massive blood stain with the knife sticking out of it is on her right side, she's somehow still alive after all of that abuse I gave Chara earlier. That I gave... her... or Chara? Possession is almost as confusing as time travel and timelines.

"damn it... i love you so much."

"... Yay..."

(2019 edit)
(i actually hate this chapter, she should be dead)
(and she beat Chara so easily)
(younger me sucks)