This was requested by @XxNightmurrXx.

While writing this, I have come to the conclusion that I don't know which role Killer plays in the Dreamswap AU (If you can even call it that, seeing that it is actually an entire Multiverse) from Onebizarrekai , so now, it's probably messed up.

Dreamswap

Yet another rush of LOVE fueled his rotten soul as he laughed and draw his bloody knife back, creating a cloud of dust while doing so. " How was that, Chara ?" , he asked, turning around to the floating ghost child he called his mentor. Suprisingly, they weren't smiling like usually, but frowning instead.

" Decent. If you'd do this in a public place, there's no way that you wouldn't get caught. It's too dangerous to be so careless with Justice Reign's eyes everywhere. Knifes and magic are easily tracked down these days, we must find a new way to escape the system." Despite the nasty comments they would make at times, somewhere deep in that demonic mind, they did care about their copanion. Killing was always funnier when you could be sure that you wouldn't be the only survivor after all the sane people died.

A thud caught both of them off guard, causing them to flinch and turn around immediately. There should be no left to surprise them, unless the inhabitants of this world had somehow become zombies...But those didn't glow as bright, did they ?

Somewhat impressed, and maybe even a tiny bit wary his empty eye sockets focused on the person holding the deadly weapon. A shiver ran down his spine as he caught a glimpse of two giantic, glowing, feathered wings. He had only heard legends about the leader of the greatest organisation in the Multiverse, but here he was, standing face to face with the positive guardian.

Before Killer could even try to say anything to defend himself, Dream spoke up : "Well, it took you quite a while to figure that out, but you're right, we do have eyes everywhere, and you've just been caught murdering. Arrest them, maybe they know something about the whereabouts of my brother."

" Yes, Sir ! But, uhm...How are we supposed to catch the ghost ? We can't see it after all-N-not that I doubt it being there if you say it is ! "

"Simple. If a ghost wants to stay 'alive', as in have a choice, move, and such things, the remains of their soul have to latch onto a living being, similar to a parasite." At those words, the shorter skeleton glanced over to the kid, expecting...He didn't really know what he expected, but certainly not the guilty look he got. He had never seen the kid showing THAT emotion before, not that they showed that many, anyways...

"So, if you wish to stay here, Chara, it'll be just like when you waited for Frisk, with the only difference that they'll never come. Either that, or you come with us, out of free will and with your current host."

The adressed being clenched their fists and crunched their teeth, but kept their head down. They knew it was true, every single word leaving the winged boy's mouth.

Of course, the one wielding the sharpened knife would never think of giving up so easily, no matter who threatened him, even if there was a great chance of dieing as soon as he took action, it would end there, anyways. Killing criminals was their job, after all. So, he let his almost invisible, actually black, eyelight dart around, trying his best to find an opening, when he saw a tear in the air right behind the guard that asked about his partner earlier. It was purple, and opening ever so quickly-A portal. But whose ?

As if he had read his mind, the tall skeleton's head snapped around, his yellow eyelights shrinking as a purple boot stepped out of the rift. Soon after, yet another set of well known skelton followed, all of them prepared to fight if nessecary.

It took Killer way too long to register that Nightmare was mouthing something, and even longer to realise that it was simply 'RUN' , but he immediately did as told, dragging the spirit with him.

Unfortunately, Dream must have noticed, because one of his soldiers, another monster wearing a brown scarf, followed quickly. Panicking, the murderer payed no attention to his surroundings, and payed the prize as he fall into a hole he hadn't seen.

Original Multiverse/Anti-Void

Nothing special was happening, like always. AU's were created, worlds were destroyed, everyone was fighting, and Error was knitting.

And even that ounce of peace vanished when a body fell down all of a sudden, especially since it wasn't dead. At least the Destroyer was pretty sure that it was alive, but it was surely covered in an awful lot of blood and dust, so he wasn't sure. Despite this, he approached the growning pile of bones, not sure wheter he should just end their misery or atempt to help.

Why was everything white ? The surface he was lying on didn't feel like snow, it wasn't even cold, he could actually not say anything about the material it was made of at all. Where was he, anyways ?

" KiLleR ? WhAt aRe yOu dOiNg hErE ? ...Do yOu nEeD sOmEtHinG ? " , a glitching, unfamiliar, voice interrupted his train of thought by calling his name unexpectedly, and he rolled around, now facing the ceiling, which was, weirdly enough, also white, but decorated with blue strings and...Were those souls ?

Already slightly irritated, he turned around, jumping back when he met eyes with the god. He was about to ask how the other knew his name, when it dawned him that he'd have the suprise effect on his side if he attacked now. That was one of the lessons Chara would repeat over and over again, it's so much easier to kill an enemy who isn't expecting you to attack. With an inconspicuous motion he checked for the knife he'd always hide in his sleeve, smiling at he feeled the familiar pressure.

" ...KilLeR ? " , the voice sounded confused, almost suspecting, but that couldn't be.

The weapon cut through the air as he slashed upwards at an inhuman speed, expecting to hit the chest, or at least the arm, he was aiming for.

Instead, the force that clashed against nothing but air pulled him forwards, causing the unamused skeleton to stumble and eventually fall down. However, he was quick to pick himself up again, searching for the enemy he had obviously underrated. "Where are you...? Come here, I won't hurt you..."

" I'm aBovE yOu, aNd yOu'Re aBouT tO hAvE a bAd tiMe." , was Error's only response as he wrapped his strings around the insane monster. " MaN, cAn'T NiGhtMaRe tAke cArE oF hiS cHiLdrEn wiThoUt mE ? i thOugHt I'd hAvE a dAy oFf fOr oNcE..."

He could not answer, for his jaw was fixated by the crackling strings he thought to be nothing but decorations, but he was too busy trying to escape to listen, anyways. Though, nothing seemed to help, and his prison got tighter the more he struggeld, so he gave up and decided to see what would happen.

Error only shook his head at his friend, not quite sure just what had happened, and proceeded to create a portal leading to Nightmare's realm. The carved wooden door were often worth studying, but not today, their only purpose at this day was to make enough sound to lure the king right to it. It didn't take too long for a tired octopus to open it after he knocked, too, and his annoyed gaze was apparently enough to convince the Embodyment of Negativity to let him in. A spark of curiousity in the goopy skeleton's dull eyes lead him to explaining the reason for his presence as he sat down on a comfy chair. " I tHinK yOu'rE miSsiNg a oNe oF yOur bOyS, aNd hE waS oUt fOr bLoOd."

"...What ? No, they're all here, why? I wouldn't be as tired if they weren't."

"BeLieVe mE, oNe esCapEd, bUt I caUgHt hiM. WeLl, hE wAs acTuaLlY cHarGinG aT mE wiTh a kNiFe, bUt iT waS a rEaLly cLuMsY oNe, sO I'm nOt sUrE wHetEr iT waS jUsT aN aCt oR nOt."

"...Who?"

" Killer."

"No, that's my choclate, Cross, it's not my fault if you already ate yours !" , an all too familiar voice, Killer's sounded.

"...See ? They're all here, I don't know who or what you caught, but it was certainly not Killer. But you're free to stay, anyways, I'll just have to go and prevent a fight from happening, so I can't be there for you for a second, sorry." , and with that, he left the two of them alone in the living room, maybe just a bit concerned for his gang.

Curious, but now also wary, the God of Destructioon opened the package he made, only leaving DS!Killer's arms and legs tied together. " NoW, iF yOu aRen'T KiLleR, wHo aRe yoU ? A sPy, pErHapS ?"

" No, I am Killer, and I'd spy for noone but myself, because I am the only boss I'll ever obey."

A soft and quivering laughter escaped the immortal :" YeAh, sUrE. AnD wHat aBoUt ChAra ? "

"That is...uhm...They're- They aren't giving me orders, just helping me..." , a soft blush of embarrassment dusted his white cheeks as he answered, doing his best to protect his best -and only- friend.

" BeCaUsE cOnVinCinG yOu iNtO eRadiCatIng yOuR eNtiRe wOrlD iS sUcH a niCe "sUggEsTioN". "

" Y-yeah, it was ! Now I have LOVE, and power, and Justice Reigns as my worst enemy..."

" JuStiCe ReiGnS ? WhAt'S tHaT ? "

" As if you didn't know ! Everyone knows them, and I even met their leader !"

" AnD wHo wOuLd tHaT bE ?"

" Wha-Dream, of course !"

" DrEaM ? I cAn'T reCalL hiM bEinG a pArT oF aNy groUp oTheR tHan tHe StAr SaNsEs..."

" The what ? Are we even talking about the same person ?"

" DoN't bE siLlY, tHeRe iS oNlY oNe DrEaM, NiGhtMaRe'S bRoTheR. ThE STaR SaNsEs, yOu knOw, tHe gRoUp cOnsiStiNg oF Blue, DrEaM and iNK, tHe hEroS ? "

" I mean, I knew that Dream and Ink were both a part of the same team, possibly eaven more than just teammates, but Blue ? I thought he worked for noone, because he finds manipulating people far funnier ?"

" ...Blue ? NoT tHaT hE wOuLdN't bE cApaBle oF dOinG iT, bUt sEriOusLy ? I dOuBt he'D dO tHat. ANd InK aNd DrEam a tHinG ? NiGhtMaRe wOulD kiLl whOeVer eVen meNtiOneD thaT, aNd mOst likeLy tortUre SkiTtlEs tiLl hE caN't tHinK aNymOre iF hE eVen tRieD aS mUcH aS lOokiNg aT hiS twIn iN tHe wRonG wAy."

"Pff, I'd like to see him try, but he already did that for years, didn't he ? Not even his 'team' , the Memesquad, I think, would be able to help him ! Especially not- Wait, that's the reason you look so familiar, I've seen your WANTED posters ! You're Error !"

" I mEaN, yOu'Re nOt wRoNg, mY naMe iS ErRoR, bUt thE reSt wAs jUst noNseNse. EvErYonE kNoWs wHaT I loOk liKe, tHerE aRe dEfiNetlY nO sUcH tHinGs sHowInG mE, anD I'm nOt a mEmBer oF aNy TeAms. ...ExEpT NiGhtMaRe's, mAybe...pRobAbly..."

" But...Isn't that just what I said ? You, Cross, and Dream's brother are a team ? "

" No, nOt tHaT I rEcAl. AnD iF, yOu're iN iT, tOo, aS wEll as HoRroR and DuSt."

By now, their faces were only inches apart, but they continued arguing, anyways. That was, until the Killer of this Multiverse suddenly entered. His actual plan would have been to ask Errpor something, but the other him on the couch kinda made him forget what he wanted. After a few moments of irritated silence, he sighed, simply mumbeling " Ink's an idiot..." , before leaving.