Stone Cold Pacifist (Horror Sans x Reader)

PLEASE READ BEFORE GETTING INTO THE STORY.
Your name is (Y/n), and you play the role of an unusual pacifist. In the story of Horrortale, your unique soul allows you to see WD Gaster who no longer holds a powerful connection with the underground due to the inactive core. After your parents are killed, Gaster makes a deal with you. He will help you extract revenge on your parent's murderer, and in return... you were going to fix the core in the underground. While Sans failed to do it when everyone went insane, you knew what you had to do because well. The creator of the core told you everything that you needed to know. The real trick isn't the resources that you've been gathering during your time on the surface for the job, it's the things that are in the underground that you have yet to obtain.
While it is true that you have a lot of experience with fighting and a high amount of LV thanks to Gaster's guidance... you now decided to stop killing, and start saving.
......
But can a stone cold pacifist truly manage her way through Horrortale?

Okay, a quick note. This story is rated mature, blood, gore, some more sensitive things that you might find extremely suggestive. Since people are enjoying my Nightmare x Reader story, I decided to do a little bit extra. My updates with this book will be a bit slower. (Totally didn't write this story because I wanted to do a drawing of horror for the cover.) This story is kind of a slow burn, but unlike my other story, the reader is no pushover.
Like in the The King's Queen, the cover DOES belong to me, so please do not steal it, etc.
Remember these important keys when it comes to reading the story!
(Y/n): Your name
(E/c): Eye color
(H/l): Hair Length
(H/c): Hair color
(S/c): Skin color
(F/c): Favorite color