You were taking a hike up Mt Ebott the supposedly cursed mountain. You found a cave on the mountain. It was getting dark and it started to rain so you decided to set up camp in the cave. You enter the cave and it is very dark. You don't see a stray vine and trip into a hole you didn't see. You hit the ground and fall unconscious

You wake up with a massive headache on the cold hard ground. You are amazed that you survived from that height without something to break your fall. You look at yourself making sure nothing is broken, you realize you became Chara from undertale. You panic hard as your head pounds in pain. You are stuck as Chara.... forever...