A/N: I was originally going to be publishing the entire story in one chapter, but since my draft was in ao3 it would have been automatically deleted soon so I had to post it there or else lose it. I decided that I might as well post it here too.
Your name is Dave Strider and you have a demon to get rid of. Namely, the one perched just outside your window atop the windowsill with his stupid ugly mug pressed to the glass like the creepy fucker it is.
Had it been literally any other demon, you would have flipped a shit, grabbed your sword, and called Bro for backup, at which point he'd promptly join in on the shit flipping before storming in and slicing open the freak of nature that was about to break in and try to eat you alive.
Something about you is like catnip to certain otherworldly assholes, attracting them from miles around and generally making your already challenging life a whole hell of a lot harder- pun intended of course, being able to make a plethora of low quality puns are the least you deserve in compensation for having to deal with this sort of harassment on a weekly, sometimes even daily basis. You can hold your own against the little guys, gals, and whatever else the underworld upchucks into this plane of existence; you don't think half of them have any genders to speak of and you aren't about to pause and ask them their pronouns.
You didn't fight the humanoid ones yourself though. Never the human ones, those were the ones you needed Bro to take care of for you. If it didn't have spikes, horns, extra eyes, heads, limbs, tails, and fuck knows what else attached to it, it meant it was so grossly overpowered it didn't need any any special hardware save for the odd thing here and there.
This is one of those demons.
You're used to this particular demon though. It's more human than any you've seen before, the only hints to its true nature being it's greyish skin, unnaturally blue cat-like eyes in a shade best described as electric (they glow too- nothing quite like waking up at two am and seeing nothing but two glowing orbs just a few feet away from you) with black schlera, a plain old tail with nothing but a puffy little tuft of fur at the end, and the standard claws and sharp teeth. Oh, and it has horns and wings too, completely stereotypical, zero out of ten for creativity. The same could be said about its clothing, a plain grey tee shirt and jeans (if anything could stand wearing jeans in the dead of the Texan summer it was a literal demon from the firey pits of hell). Most demonics go nude and are hardly more than putrid lumps of flesh with far too many appendages and gaping mouths to count, making this one look practically sleek and streamlined in comparison, even if it doesn't actually look very human as it gently buts its head against the glass of the window, careful not to break or even crack it. It could have rammed right through it if it wanted, but it's always still careful not to for whatever reason.
It's an annoying pest, make no mistake about it, but the worst it's ever done was creep around your window and stare at you for hours, occasionally snagging a crow to messily devour. You've still always made sure to never open the window when you think he might be near. He only comes on the nights your Bro is out Dj-ing or out hunting down a demon that's wandered too close for comfort, so at least you aren't constantly paranoid he'll randomly show up and dismember you for the fun of it, just on nights like those.
You hadn't noticed him the night he'd first appeared, head cocked to one side and eyeing you like a cat would an injured bird. He was silent as per usual, and you only realized he was watching when you'd nearly knocked a jar off the shelf containing your dead things collection, just barely catching the carefully preserved animal in the nick of time. You'd glanced up for no reason you can currently recall, maybe he'd tapped on the glass, but you caught sight of him and the glass jar slipped from your fingers and onto the floor, shattering into at least a dozen shards and its soft cargo splattering in foul smelling smears.
Bro wasn't there and there was a likely very powerful demon staring you in the eye as it licked it's lips hungrily, balanced on the balls of its feet with one hand braced against the still-warm glass, its tail flicking back and forth. In all honesty, when you'd lunged for your sword you kept by your turntables, you hadn't thought you'd live to see the next few minutes, maybe you'd live to the next hour if it decided to toy with you first.
But, surprisingly, the only movement it had made was to get down on all fours with its finger and toenails digging into the brick beneath it so it wouldn't fall off. You'd stared it down for a good half hour, neither one of you moving an inch until the stalemate was broken by one of the dumbass crows landing in his hair and the demon nearly fell from the building trying to swat away the scavenger. It still managed to hang on despite his best efforts, resulting in a very disgruntled looking demon crouching on your windowsill with a crow fluffing up with pride at its hard won perch.
You'd given a brief snort of laughter at the sheer ridiculousness of the situation, though your amusement was quickly cut short when he'd suddenly snatched it up and threw it against the window with enough force to literally fucking splatter the window with bird. You'd seen some seriously nasty stuff, but jesus, the demon was fucking preening at this point, a smug little smirk across its (not so) ugly face.
Upon noticing your disgust, he had suddenly stiffened up and grabbed what remains of the crow so he could shove it in his mouth, swallowing it bones and all. He then proceeded to act like nothing had happened, settling down to clean his hands via tongue washing.
You didn't want to make the first move, not when it was almost certain death for you. Something told you that it would have been able to take down even Bro if it wanted, and you tend to be one to trust in your instincts.
He'd watched you for at least another fifteen minutes before you had to back out of the room to piss in the bathroom down the hall; you'd peed from the side of the toilet so that your back wasn't to the door in case it decided to try and sneak up on you.
When you returned, he hadn't made a single move to break in and you cautiously went about your everyday business, not wanting to provoke it somehow. Bro was out later than normal that night, and you'd left your phone at your friend's, Rose, house so you were left with anxiously waiting for him from on your bed, refusing to look at the demon as you fought to stay awake.
You must have fallen asleep at some point though, because the next thing you remember was waking up at about two in the afternoon with no sign the demon had ever been there. You'd had doubts about whether or not the events of the night before had actually happened or not, so, with your stunning intellect, you neglected to tell your Bro about the demon. He had enough on his hands as it was, no need to make things harder on him by getting him to hunt down a demon that may or may not exist.