A/N: Hello all! Welcome to my second story "I Only Ask For Mercy"! This story is heavily inspired by "The Witch's House". Please enjoy the story!

Disclaimer: I do not own Gravity Falls or any of its characters.

Prologue: Bless Your Soul, Curse Your Soul

My mother once told me there was a man named God. She said he loved everyone and punished wrongdoers. I asked her if I had done anything wrong. She didn't answer.

My parents went to an old woman when I was much younger. The woman didn't seem to like me, for she glared at the sight of me. The woman told my parents I was cursed, that I was being punished for an unholy doing of one of my ancestors. I asked my father what that meant. He didn't look at me.

I was confined to my bed, but no one forced me to. I figured it would've been better for my parents if I stayed in my room and didn't complain when my mother's medicine tasted like mud that a dog had vomited. I behaved well, so why is God punishing me?

I began to question what I had been told. Did God really love everyone? That seemed like an exaggeration. What had I done wrong? I didn't understand it.

Then he came.

"Yeesh." The man said, taking in the sight of my inflamed legs and face. "You're pretty roughed up, kid."

"Who are you?" I asked in my voice, sore and rough from lack of use. "How'd you get in here?"

"Name's Bill Cipher, kid!" The man greeted. "And for how I got in… Well, that's not important. What is important is you need some help!" I looked away. This man, this Bill Cipher, was certainly strange. "So, how's about you and me make a deal!" I looked back at him. A deal? My eyes looked towards the metal cross above my window, then back at him.

"What kind of," I coughed. "deal?"

"Well…" he paused, as though he were thinking. "I'll give you your health, and in return… You get me a vessel!" A vessel? Like, a container? "Exactly like a container!" I paused. "Yes, I can read your mind." I looked down.

"How can I get you a vessel?" I asked.

"Oh, don't worry about that." Bill smirked. "Someone will come along very soon." He paused, slightly frowning. "I would prefer a male vessel, but the one that's coming will do." I wondered what he could mean. Did he mean he wanted a human body? His hand flew up into blue flames. "So, what do you say? Deal?" I paused, considering the flames. "Don't worry. They don't hurt." I wasted no time in agreeing. I hated this broken body, I hated not being able to go outside, and, dare I say it, I hated my parents.

"Deal."

My parents didn't visit me the day after. I heard no sound outside my room. Did they leave me? I suppose it was going to happen eventually. I was completely useless and a burden to them. Bill stayed for a while, and I felt like asking him to check if my parents were still here, but decided against it. He wasn't my servant. If anything, it felt like he was my savior.

Someone did come after a few days, and I was surprised I was still alive by then. It was a girl with cute blonde braids. She came in, hearing rumors about an abandoned house in the forest where I lived. Her friends dared her to come here. At least, that's what Bill told me. When she came to my room, she screamed, not expecting to see a body. When I moved, she passed out.

"Good work, kid!" Bill praised. I was about to protest, seeing as how I didn't really do anything, until Bill snapped his fingers. My legs and face didn't feel flaming. Upon further observation, my legs looked… normal. When I looked up to thank Bill, he was gone and the girl was awake.

"Bill?" I asked, not noticing the girls eyes.

"Right here, Kitty!" I looked to the new voice. It was the girl. "Thanks for the vessel!"

"You…" I paused, trying to register what happened. "You… possessed her?"

"If you want to put it that way, yes." Bill shrugged. "And you should be better now. So, you can help me with my plans!"

"Plans?" I don't remember being informed of any plan.

"We'll work out the details later." Bill said quickly. "Come on." He took my hand, helping me stand.

"Where are we going?" I asked, stumbling as he led me out of my house.

"You know that town nearby?" He asked. "The one called Gravity Falls?" I nodded, caught up in the feeling of the grass under my bare feet. "We're going there!" I followed him to a road.

"What are we going to do there?"

"You ask a lot of questions, don't you Ellen?" I didn't respond, for I suddenly felt tired. I let go of his hand and collapsed onto the dirt. "Ellen?" His voice seemed distant. The last thing I thought, was to God, if he existed, thanking him for Bill.

"Man, you messed me up, Ellen." A heard a girl's voice. I looked around the darkness until I saw the girl Bill possessed. Her blue eyes stabbed at me with a knife of hatred.

"Who are you?" I asked, my voice shaky.

"I'm Viola." Viola sighed. "Thanks for getting me possessed and scaring me half to death, by the way." Her voice was sarcastic and cold.

"Why are you here?" I asked again.

"You made one hell of a mistake, Ellen." Viola shook her head, her braids swishing from side to side.

"What did I do?"

"You made a deal with the devil."

A/N: There's our prologue! I hope you all enjoyed! If you have ideas you want to see, please let me know! See you!