AN: I don't own One Piece or Tokyo Ghoul, they belong to Mr. Oda and Mr. Ishida respectively

"C'mon Ace, why don't you eat something?! You must be starved!", the ever energetic chef known as Thatch called, waving a plate of delicious food in front of Ace's face. That would be the cause, if Ace was able to eat the food in front of him. To every normal human, it looked really good. A perfect combination of rice, raw fish and algae, also known as sushi. To Ace however, it smelled like a mixture of old glue and paper, raw, rotten fish intestines and moldy rubber. Don't even get Ace started on the soy sauce that Thatch had dripped delicately along the side. The worst thing about it was that Ace knew it would taste even worse than it smelled. On the other hand, the chef smelled absolutely amazing, and Ace hated himself for that.

Ace was a ghoul.

Ghouls were known as cruel, heartless monsters that killed for fun. Monsters that slaughtered thousands of people without batting an eye. They could be identified through the tough skin they had, their kakugan and their kagune when they were hunting. But most importantly, ghouls had about 10 times as many RC-cells as the humans. Added to that, they were unable to consume and digest anything other than human flesh, causing their need to hunt.

In other words, it meant that Ace was a monster. A filthy monster, that didn't deserve to live, that didn't have a place to live. A world to belong in. Not that he would have had that right in the eyes of the world, they hated his father after all. The late pirate king, Gol. D. Roger. He himself learned a long time ago, that he was an honourable man, worthy of being called a father. Still, he wouldn't ever be accepted. Not as what he was.

He liked it here though, the people were nice. He didn't want to hurt them, so he tolled Thatch to piss off, more than likely offending the cook. His excuse was always that the food could be poisoned, but in reality he just couldn't stomach the horrible contraption humans called food. It was understandable. That's how he managed the months on the ship without eating anything. Still, he knew he couldn't last much longer. He was getting hungrier by the second, and he wouldn't manage it much longer. The next island he was gone he told himself, he wouldn't hurt them.

He had had a few close calls, way too close calls. During his fight with Whitebeard and during the interactions with the other commanders. One time, Haruta and Thatch decided to sneak up on him from behind, jumping on his back. He was lost in thought, so he didn't smell them. When they jumped, he could barely keep his kagune from emerging. It wouldn't have killed them, but it would have hurt them and revealed his secret. That was the last thing he wanted. There were numerous other close calls, like the one time when-

Suddenly, someone cleared their throat, bringing Ace back to reality. he looked up to see the familiar pineapple-shaped face of the first division commander Marco. He placed a cup of black coffee next to Ace, the only thing that he had consumed in front of the crew before. The only thing he could enjoy like the humans did. Marco then knelt down next to him.

"if you don't eat, at least drink this-yoi.", he said placing the cup in Ace's hands. Ace immediately gulped down the beverage, which was really good. Not Anteiku quality, but good. It helped him feel less hungry. "Thanks..", he mumbled.

Marco looked at him. "You are clearly hungry Ace. Why don't you eat anything. It isn't poisoned or anything, and Thatch really put effort into it-yoi. You only ever drink black coffee. No sugar or anything. That's not healthy, you know-yoi."

Ace sighed. He really appreciated Marco's efforts, but he couldn't tell him the truth. If he did, Marco would hate him. And word travels fast on a pirate ship. He didn't notice the tears starting to travel down his cheeks.

"Woah, woah, Ace! What's going on-yoi? Are you ok?", Marco asked, a little shocked. Ace had never cried on the ship. Never. And he didn't even answer Marco, he just lowered his head and started crying more. Marco tried to comfort him, but to no avail. That was when Marco decided to take drastic measures. He picked Ace up and started carrying him into his room, ignoring Ace's light protests.

"So, what's going on?", He asked. " It's gotta be something major, or you wouldn't cry like that-yoi. And it is preventing you from becoming our brother. You can tell me-yoi, I'm there for you. And so are the others."

Unbeknownst to Marco, Ace was freaking out pretty bad. The close proximity to Marco made his hunger flare again, and he couldn't control his kakugan anymore. His right sclera turned black and his iris turned red, veins visible around the eye. He didn't want Marco to see, so he turned away.

"Listen, Marco", he started," I really appreciate everything you guys are doing, but you don't want me on your crew.", he sobbed, instinctively covering his right eye with his hand. "Believe me, you don't want me on your crew and you shouldn't!"

Marco on the other hand was confused. Why did Ace think so lowly of himself? Marco positioned himself in a way, that he could see Ace. "Of course we want you on the crew Ace! You were our brother from the start and that will never change-yoi." Then he realized something. "We won't care that Gol. D. Roger was your father-yoi."

"H-How do you know?", Ace asked, hand still covering his eye.

" I knew your mother. Portgas. D Rouge. A charming woman who only loved one man. You are pretty similar you know-yoi.

And Roger was an honourable man too. And if I recall it correctly, there was only one woman alive bearing the name of D with the last name Portgas at that time. I simply connected two and two."

Ace sighed. They wouldn't judge him for his father. Still, he was a monster and he had to make it clear that he shouldn't be on the crew. He decided to voice just that. " Marco, please, I'm a monster. You don't want me on your crew", Ace sobbed.

"Ace, what are you talking about-yoi? You aren't a monste-"

"FOR GOD'S SAKE MARCO, YES I AM A MONSTER!", he hollered, bringing his hands to his head in a desperate manner, leaving his eyes unshielded. He regretted that as soon as he opened his eyes, kakugan visible for the whole world to see. He could see the shock on Marco's face before slamming his hands on his eye again.

"A-Ace.." Marco stuttered, a bit shocked by the revelation. Ace's eye was that of a ghoul, black sclera and red iris. So this was what was preventing him from joining. What made him think he was a monster. He was afraid of hurting them, of potentially killing them. But now everything made sense, why he didn't eat and only drank black coffee. He was probably pretty hungry, he had been on the ship for about three months now. And as far as Marco knew, and he knew that stuff pretty well, ghouls had to eat at least a body every two months. They needed to get Ace something to eat, and fast. Not only because they didn't want him to snap, but also because he was their brother. And no brother of theirs went hungry. Luckily, Marco knew just what to do. So again, he picked Ace up, positioning his head in a way that no crew members could see his kakugan . That, of course, shocked Ace a bit, not expecting this.

"M-Marco, w-what..?", he managed to bring out, shaking and still sobbing.

"I'm gonna get you something to eat", Marco said, starting to carry Ace down the hall. Ace then turned to look at him, confusion written in his still teary eyes. Marco noticed this and sighed. "Ace, we don't judge people for things they aren't responsible for. We don't care about your past, parents or species. You are our brother nonetheless, you have been that from the beginning. Nothing will ever change that."

Ace looked up, hopeful that Marco was telling the truth. He wanted to be normal for once, to be accepted. Sure, Luffy, Sabo, Gramps, Dadan and her bandits, Makino, the mayor and his old crew had accepted him. But he had always thought they were exceptions in this sick and twisted world. But he wanted to believe Marco. The crew had been nice to him, even while they knew he was trying to kill their captain. Their antics had wormed their way into his heard and he could hardly imagine a life without the crazy band known as the Whitebeards anymore. Maybe, just maybe he could trust them. Marco hadn't rejected him the moment he found out. Maybe, just maybe...he could really trust them.

"Why do you call him father?" That question came out of Ace's mouth before he could stop himself. Despite not hating his father, some of the negative emotions remained. It wasn't easy to forget everything the people had said to him all those years ago. He knew his father wasn't like that from somebody that actually knew him. But he wanted to know why they called Whitebeard that.

Marco looked at Ace and answered:" Because he calls us sons. It's just a word, but it makes us happy. " Marco smiled, remembering all of the good times he had with his family. If their was one person worthy of being called father, it was their pops.

And with those words, Ace's resolve to not join the crew shattered completely. They all were so happy, and he wanted to be happy too. A part of a big happy family. He just had to talk to pop-, he meant Whitebeard. Maybe, just maybe, he could belong here.

AN:So, this is something I decided to try after not finding one of these! Of course, that could be my own incompetence but I really liked the idea and wanted to try it out. Since this is my first crossover, it might be a bit bad but, oh well! Ya gotta start somewhere. This is also not following the cannon for Tokyo Ghoul or One Piece, and there are going to be a few major changes to the story that I can't reveal yet since it would ruin the surprise! Well, one of them being that Ace doesn't hate Roger. BUT THAT HAS A VERY GOOD REASON! I SWEAR! You'll find out why later. But yeah, this is basically that Tokyo is an island in the grand line and Ace is a natural half ghoul. Speaking of which, anybody have good ideas for his ghoul alias? Mine aren't too great. Just write them in the reviews! Now to the pairings, while I feel myself capable of writing fluff, I think I'd screw up the lemons. And quite frankly, I don't feel ready to write that either. So when the time has come and you have an idea, just PM me and I'll mention it in the story. Same for any ideas you have that I should use in the story. PM me about those or post them in a review. Well then, before I bore you I'll leave. Until next time!