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The Demon of the Sea and His Human

Summary:

Dipper woke up to the sound of his cabin door slamming open, sun still rising. He grumbled, pulling himself under the covers while the light seeped through the thin sheets and the cold ocean breeze creeped into his room. A bouncy girl whom was sadly and early bird, his twin Mabel, had awoken him with glee. “Dip dop! Rise and shine!” she tugged the sheets off of her grumpy twin. “Come on, can’t you taste the adventure? Grunkle Ford said it was important we were all on deck!” she bounced around his room, pulling his clothes messily out of the cabinet.

Notes:

Hello hello! This is my first attempt at the pirate AU! This is non-beta'ed so if you find errors please let me know! I'll be editing errors as I find them! This fic is based off an RP a friend and I are doing! If you like part one lemme know! I live for reviews! Enjoy!

-Loki

Update: writing Bill is hard. Ugh I wanna die! But I'll be putting up the next chapter as soon as I get more feedback! Till then!

-Loki

Chapter 1: Demons Make For Trouble

Chapter Text

Dipper woke up to the sound of his cabin door slamming open, sun still rising. He grumbled, pulling himself under the covers while the light seeped through the thin sheets and the cold ocean breeze creeped into his room. A bouncy girl whom was sadly and early bird, his twin Mabel, had awoken him with glee. “Dip dop! Rise and shine!” she tugged the sheets off of her grumpy twin. “Come on, can’t you taste the adventure? Grunkle Ford said it was important we were all on deck!” she bounced around his room, pulling his clothes messily out of the cabinet.
“Okay- okay Mabel I-” He squeaked in surprise as clothes were thrown at him. Blushing, he glared at her playfully. “Just let me change and go ahead. I’ll see you up on deck.” He mumbled out while tugging on his dress shirt buttons. She ran out the door, screaming something about finding a merman. Dipper sighed, pulling his blue vest over his dress shirt and grabbing his journal from underneath the pillow. Quickly raking his hands through brown fluffy hair he stood, tucking the journal in his vest and giving a quick glance to his silver sword. It was bound to him after being crafted by a spirit, covered in green and blue gems forming a pine tree emblem on the handle. He never got to use it anyways. He rushed out the door to catch up with his twin and glimpsed at the horizon, the sun rising, painting the sky in deep oranges and specks of purple. He stood in a full line of his companions on the ship. Mabel of course, his two Grunkles, Soos, Wendy, and a pig Mabel had forced Grunkle Stan to let on board named Waddles. It eventually grew on everyone, especially Dipper.
“Alright you deviled seachildern, get to work. Mabel and Soos, go check food supplies. Wendy, keep an eye. Dipper… Well you can wash the deck.”
He groaned internally at that. He was never given any real work, like he had no brawn. “But I can do something more important I-“ he was interrupted before he even put the statement out, well more as everyone had already gone about their jobs.
Dipper sighed and picked up a mop, grudgingly wiping the deck. It had been an hour or two of aimless wandering for sea creatures before Wendy shouted “SOMETHING’S AHEAD CAPTAIN!” Maybe Mabel would finally meet her merman. It was probably just some rock anyway. Turned out it was more than a rock. A goddamn ship! “I SEE A SHIP!”
Grunkle Stan snorted. “Probably just some shipping ship.”
Ford, however, looked nervous as he grasped a telescope, looking at the flag. Color drained from his Grunkle’s face as he lowered the telescope. “PREPARE FOR BATTLE!” Dipper dropped his mop and pushed it to the side. They never fought anyone who wasn’t supernatural. He ran to the cabin in search of his sword quickly.
Captain William Cipher, better known as Bill, was one of the most feared pirate captains to roam the seven seas. Many whispers floated around about the pirate. Some claimed he had magic powers while others claim he was the devil himself. Not that Bill ever confirmed nor denied any of the rumours. He was sure a looker as well. Messy short blonde hair swept back in a messy yet pleasing way. His face was like that of an angel... all except for the devilish smirk and triangular eyepatch. He and his ship, the Mindscape, were infamous. This day, as the sun rose, he looked out his spyglass, spotting his prey. A grin that was a little too wide spread across his face. "Ready the cannons boys!" He yelled to the crew. Finally he would get his revenge on those blasted Pines.

The boat churned at a sickening pace as waves crashed threateningly against the sides. Stumbling around his room fast he mumbled curses under his breath, eyes sweeping for his sword.

"Dip Dop! We've gotta grab the cannon powder from the cargo hold, hurry!" Mabel’s faced appeared by the door frame with a frantic look as she clung to a bedazzled grappling hook, knuckles white. Why were they even attacking us? They didn't look like a rich ship but they clearly wanted to battle.

"Aye, I will Mabel just please!" A glint passed his eye by his bed and he ran towards it, grabbing the sword from underneath his pillow. "Ok let’s go." Dipper put on his bravest face and they ran out onto the deck, skidding around to the cargo holds door. Mabel pulled it open in an inhumanely possible speed, rushing down the stairs to the dark space. It stunk of dead rats and rusted gold. He was about to enter before the boat was hit by something, sending him flying backwards on the deck hitting the railing and the cargo hold door slamming shut.

His eyes widened and he scrambled towards the door pulling against it, but it didn't budge. Ford looked angry, barking orders at Wendy and Soos to pull the cannons in place faster. They were heavy and hadn't been used in a long time, but slowly yet surely grated on the wood in place. They had a limited amount left in them, and Dipper couldn't get into the storage. He glanced at the attacker’s boat and felt fear strike him deep. It was a large powerful ship, looking ominous and threatening. A giant black flag strung across their pole, waving aggressively in the wind. On the flag is what truly caused dread. A single golden and red eye seeing and watching all. This was one of the most feared pirate ships across all seas. He gulped and shivers ran down his spine as he continues to tug on the door, which opened promptly in his face followed by Mabel tumbling out on top of him. He groaned in pain and rubbed his face, but hugged his sister tight with his other hand.

Stan pulled the twins up gently but quickly and pushed them behind him protectively. "They can't fight Ford!" Ford grunted with a look of something unsure, emotions mixed and sloppy with fear and anger. Dipper pushed ahead and dragged his sword from his sheath, ready for battle.

"I can! I'm not as weak as you all think I am!" He growled, puffing his chest and squaring his shoulders to seem intimidating. Everyone nodded and looked at the boat in suspense, readying defenses and weapons.

Bill swung from the rigging in the masts down to the deck, barking orders at the crew as they fired again upon the other ship. "PREPARE TO BOARD LADS!" Bill yelled as the ship got closer and closer. He rubbed his hands together, barely able to contain his excitement.

The boat shook once more from an attack and Dipper stumbled towards the middle of the deck, large brown orbs holding a fiery glare. The ship was closing in, looking as to board rather than just destroy their ship. Gripping his sword tighter, he tugged a mini telescope out of his hands and looked at the people on deck of the other ship. They were monstrous to say the least, some bulky men at least 5 times Dipper’s size, with menacing glares. But what caught his eye was the captain, a beautiful young man with a dangerous smile and a cocky and violent aura, grinning back at their ship in glee as he yelled at his crew which was somehow afraid of him. He was slender and tall with a soft face, but that smile felt like knives just looking at it.

Bill grinned as he locked eyes with the child. Oh how he will enjoy making his scream. Or maybe he would take him. Make Fordsy even more paranoid. Perfect. He grinned as ropes were attached between the ships. He slid across to the deck of the other ship

Ford whirled around in anger to see the famously known sea demon, Captain Cipher land on his deck and lunged towards him in anger with a sword. Dipper’s eyes widened and he made sure his knees weren't locked before stepping back to Mabel. He pulled the journal slightly out of his vest and flipped through the pages as quick as possible, trying to find anything ford could have written they could use. A spell maybe? He became engrossed in the pages, rushing quickly with his eyes and scanning over information page after page, but couldn't find anything. Mabel looked over his shoulder at the book and easily pointed out something special.

"Thank you Mabel!" He whispered and read over it carefully. He took a deep breath and looked up to see Ford tumbling towards him backwards, and barely had time to move before his Grunkle slammed down on the deck.

Bill's high-pitched cackle filled the air. "Nice to see ya again Fordsy! I think I'll be ending you now!" Bill placed his foot on the older man's chest, raising his sword above his head.

"NO!" Mabel rushed forward and landed a punch square on his face, although it wasn't strong at all.

"Mabel wait!" Dipper ran forward and reared her away from Bill, pushing her behind him and swinging his sword against the captains before it could cut skin against his Grunkle. "Got anything better to do then attack us?" He grunted, pushing against the demon.

Bill cackled. "Oh there are TWO of you! You think YOU can fight me? By all means, I'll fight you and kill you, then kill your sister!" Bill leered down at the small brunette boy.

Dipper looked up at the captain with fire in his eyes, swiping his knee against the captain’s shin. "Oh? Are you gonna kill me from there?" He trembled slightly, trying to pretend he had no fear. He pointed his sword close to the captain’s face, acting smug. Although he had no actual idea that the sword was too close as the captain could easily take it out of his hands, he played the part of bravery, puffing up his chest once more in a sign of masculinity. "You won't lay a damn hand on me or any of the Pines. Not a hair!" He sneered trying to sound malicious, more coming out as a child trying to protect his friend.

Bill laughed and easily plucked the sword from Dipper's hands. "Ah little Pine Tree. You have guts. I like that! Maybe I'll keep you!" He grabbed for the child.

Dipper screeched like a girl for a second before fighting against the pirate bare fisted, throwing punches wildly. Mabel gasped and ran in but he pushed her off to keep her away from the demon. Grunkle Stan along with Soos was fighting with the pirate captain’s crew, Ford was unconscious and Mabel couldn't do much. Suddenly Wendy popped up on the deck and tried to fire her gun at the enemies captain but missed scarcely, the bullet flying into a wine barrel, deep red seeping from underneath. The sounds of swords and gunshots clashed over the waves and Dipper tried to keep his mind clear, struggling with the overwhelming noise.