Soul War (G!sans x Nephalem Shifter Reader)

You are a young teenage girl the age of (Y/A) in the middle of war. One day while looking for supplies with your younger sister and friends/group the peace makers you are ambushed by the Soul Slayers you use you fighting skill to hold them back but are knock out cold you wake to be alone. You go on a journey to find your comrades, along your way you encounter a skeleton who offers to help you, can you trust him or will he betray you?

P.S you play as yourself as a character that I made
Warning my soul war books do have some lemons in I mention it in the beginning of the chapter if it has so you can skip if you don't like lemons