Last Hope (Fell sans X reader)

You (reader, who i will write as a girl, sorry to you boys) are a strang, and capable women, your 25 and have a dreadful life. You don't trust easily, but you still care, you have depression, anxiety, and have ptsd (post traumatic stress syndrome), and could break down in a secenet. Why did you get chosen to have a rough life? What would happen to you if you let your guard down? What would happen if you met some monsters? Will it be for the better or worse? ( WARNING! will have violence, menchion/flashback of abuse, cussing at times, self harm, and atemted suiside, reader aggression is advised!) (i don't own you, or undertale AU'S, i only own Shadow, Luna, Shawn, Star, Kike, Dave, Tiler, Taler, Shad, Ender, Ember, Midnight, and Youki )