Undertale - Patient Zero - Reader Insert

Prologue

Ever since your 7th birthday, you know somethings been misplaced within. You couldn't exactly place what it was, but the sudden headaches, the fact that no matter how much you bit your nails they were still growing too long, the fact that you could jump about incredibly quickly, or anything else for that matter gave it away soon enough.

Adopted at the age of 2; and thus never knew you were adopted until you found a note at the bottom of the staircase with your suitcases, packed with all your stuff. You had come back from school alone that day, your adoptive parents and brother had all gone out without you, and you were told that someone would be coming over to the house to take you back to 'the nice house'. Their reasons were unclear. Just that, you weren't 'like them' and that you weren't the child they wanted their son to grow up around. Your adoptive brother, Kyle, probably forgot about you; he was 3 years older than yourself, making him 10 while you on the other hand were 7. You spent my birthday in the 'nice house' but by that point you'd been there a week.

Anyone could tell that place was a bit bigger than just a house, and it certainly wasn't nice. Homely, sure. Nice? No way in hell. Unless it was hell, which it seemt like. Ever since you were returned, nobody wanted you. Over time, you became cold, and most of the time whenever adoptive families were brought up you were completely missed off their radar as an adoptable child or somehow you'd manage to slink away into the shadows quite quickly. And now here you are, standing in front of your mirror at the sweet age of 14, and freaking out a little bit.

For the last 3 years, you've developed little bumps on your skull, and over time they've been getting bigger. You kinda stopped checking them after a while, but had to start wearing a hat to disguise them. Every now and then you'd feel them twitch slightly whenever someone came close to you, or if there were loud noises. Or if you managed to spill water all over yourself, then you'd be jumping all over the place.

You had considered what's seemingly obvious multiple times, but who would believe that? Yeah, okay, so now, it might not be so crazy, but seriously. Yes, as you look at yourself in the mirror, you can see 2 black, seemingly impossibly crafted, cat ears. And if you turn around, a long black tail stretched out behind you. The tail was new : not so new, but it was certainly new. You stare back at yourself, with sharp eyes look curious as if they were a completely separate person to yourself.

A freaking cat girl. Yeah, surreeee. How can this even be possible? Welp, as much as thinking would be a fantastic option, you ARE 20 minutes late for school; and to waste more time would be very bad. Besides, nobody has to know your - this. Really, you should be more surprised, but since that day, something inside has been reluctant to reach out to anyone. Occasionally, you would wonder why. Maybe cause the only people you trusted threw you out and didn't even give a good bye, just packed you up off and sent you running. You keep thinking to yourself as you quickly brush what hair you could around your ears, before getting into your uniform.

You throw the door in as you finish tucking in your tail and then your shirt over it for a safe measure, running downstairs. Quickly, you grab your bag as you slip on your shoes; leaving without pausing or yelling out to say goodbye to any residence, they wouldn't care anyways.

A black cat, a loner. Thats what you were. Thats what you were always going to be. Right?