Disclaimer: Don't own One Piece, don't know Oda, don't have connections in Toei Studios, Shonen Jump, or 4Kids. Warning: Language.

Most of the story that involves this OC I had no intention of posting, but I really liked the idea of the fruit I made and I wanted to share it. "Chika Chika no Mi" is the name of the fruit ("chika" is Japanese onomatopoeia for the flickering of light; I personally like the translation into English for it being "Bling Bling Fruit").
This story also has a few spoilers if you haven't read/watched up to the latest chapter/episode, takes place after Enies Lobby, and goes on the assumption that Franky is joining the Mugiwara (that being said, I will almost definitely be editing this later).

Going Merry was dead, but they were able to let it go with proud tears. The others weren't quite so sure how Usopp was able to get over it, since it was his only connection with Kaya and the village he grew up in, but he did nevertheless. The Going Merry was a proud ship, although modest in comparison to what they now had, and it lived up to the end of its days returning the love it was given to its nakama.

After a tearful leaving from Water 7 and his "family", Franky joined the ship as their new shipwright. And! …He brought his guitar! Not that anyone really cared except Luffy. Luffy was the one that wanted a musician all this time. And was he a good musician? Well…

He was so-so. Not bad, but, he was a guitar guy, and that's about it. Luffy liked it, but he wanted drinking songs and pirate ballads, and, let's face it, Franky's stuff can be just plain weird. So Luffy still whined about wanting a musician.

The next island they came to was called Rumyers. It was most known for its distillery, and it had other attributes as well, just as every island on the Grand Line does. It wasn't a poor country, but it wasn't humble either. After docking in a more obscure area, they went into the large port town and looked around. Sanji's first order of business was to get the produce, and Nami of course wanted to go shopping. Chopper wanted books, Zoro wanted sake… nothing about their behavior was different.

But someone had to be left to guard the ship. Robin volunteered, since most of the others wanted to shop badly, and Zoro (who would normally stay behind and sleep) was opted out by Sanji because he felt Zoro didn't do a good job last time (in other words, he was just trying to start another fight… and succeeded).

"Tsh. Fine," Zoro finally grumbled after Sanji's attention was pulled away by Nami, "I'd rather go to a bar than just buy something and drink here anyway."

Luffy ran up beside Zoro. "Bar's have food! I want meat and soda!"

Usopp felt a sweatdrop run down his temple. "Is it really okay for those two with such huge bounties to be going into a bar?"

"Who knows what idiots think?" Sanji puffed before looking back over to the ship. "I'll be back soon to make you a special snack, Robin-chan! ♥"

Robin waved them away as they left, already burying her nose into a book. Guarding the ship wouldn't be hard for her at all, and she was getting really interested in what she was reading lately anyway. And it was doubtful that anyone would attack that she couldn't take care of: the Marines weren't heavy on this island from what they heard, and no one particularly strong like a Shichibukai was there.

A few hours had passed, and she was more than halfway through the book. It made sense that everyone would be taking their time, but she expected one or two of them to have returned by now. Besides, the lack of constant foolishness from the others was starting to make her realize how quiet it was with them out, and she started wishing for something to happen.

She heard a creak on the gangplank, and her eyes shot up. Nothing. She blinked and looked back down at her book. Must have just been the ship swaying, she thought. She continued to read.

In her peripheral vision, something caught her attention. Robin's eyes shot around again, but she still saw nothing. It was very strange, but for a second, it seemed like the air was bending at a certain place astern near the gangway. She was about to continue reading when she saw it again. She rubbed her eyes and put the book down. "Perhaps I've been reading too long. My eyes need a rest."

Robin stood up and stretched a bit before pacing over to the area that she'd been eyeing, intending to walk a lap or two around the deck of the ship. She felt that she was being slightly paranoid to check out the place that she'd been hearing noise and seeing strange things from, but the pushed that out of her mind.

But as she walked by, she unmistakably heard the sounds of someone sneaking around. From all her years from being an assassin, she knew what that sound was. She shot her glance in the area she heard it. "Who's there?"

There wasn't an answer, and she saw nothing. Even more unusual, the area that she was looking was rather in the open: no objects to hide behind or shadows to conceal oneself. She shook her head. "I was sure that I heard it over there…"

She heard the noise again, and spun around. Whoever it was, they seemed to have been going towards the cabins, but she wasn't sure where exactly they were hiding. The fact that this person seemed to have been able to hide in broad daylight made her anxious. For someone to be so skillful… perhaps they weren't outside of CP9's surveillance?

When she was certain the person was going towards the cabins, she held her breath and listened even more carefully. A few seconds later, she sprouted eight pairs of arms from the doorframe that lead inside and blocked the way as quickly as she could. Success: She could feel that something bumped into her arms, and the invisible person fell back with a thump.

"Shit! What the Hell is that?" A male voice exclaimed. "…Damnit!" The invisible person got up and started sprinting away, his footsteps betraying his movement with each clear knock against the wooden floorboards.

Robin chased the sound until it stopped. She was now on the starboard side of the ship, and she wasn't sure where the man had gone now. She knew that he hadn't gone far, since she was so close when his steps stopped, and if he had jumped to higher grounds or into the ocean, she felt that she would have heard it.

She quieted herself again and listened, slowly walking forward as she surveyed the area cautiously.

"Chika Chika no Metsubushi!" The voice cried out from her right. Robin spun around to look, and her eyes were immediately greeted with a blinding light. She let out a yelp and covered her eyes with her arms as she fell back a bit, clenching her lids at the stinging sensation. The invisible man took this as an opportunity to run, and his rapid steps lead away… back towards the cabins. She struggled to open her eyes and follow in suit, but she knew that he got inside before she could get the chance to stop him.

Once inside, she opened her eyes as wide as her eyelids would allow themselves to peel back. It was dark, and her struggling eyes were having difficulty adjusting to the change. Since she had no idea where to go from here, she stopped and allowed her eyes a chance to rest. It seemed to take several minutes, but she was able to see. It was quiet. If he was in the hallway, out in the open, he must have been holding his breath, but it was much more likely that he was in a room… one of the cabins, maybe the cargo hold…

"ROBIN CHAAN! ♥" The shout from outside startled her, and she felt her heart almost leap out of her ribcage.

She placed a hand on her chest and sighed. "It's only Cook-san." She was about to turn and walk out, but she rethought the notion quickly. "I'm in here! There might be some trouble…"

"Trouble…?" Sanji was there by Robin's side faster than you can say "dartboard-eyebrow". "I'll gladly protect you from any dangers."

"There's an intruder on board."

"An intruder! Did he hurt you in any way? I'll kill the shitty bastard!"

"No, I'm fine." She smiled at his overprotective nature. "But he ran into here, and I can't tell where he is." She thought for a moment. "Are you the first to come back?"

He nodded. "I don't expect them to come back very soon, though, so we'll have to make sure that this person doesn't get away."

"Also, he seems to have the ability to turn himself invisible."

"…You've got to be kidding me."

She shook her head. "I think he's a devil fruit user."

"I see." Sanji sighed and went ahead towards the rooms. "You stay here, Robin-chan. I'll look for him."

"Be careful, Cook-san."

"I'm glad that you care about my welfare. ♥" Sanji said happily before he entered into his own cabin.

What he thought was only going to take a couple of minutes in each room turned out to be a drawn out and tedious task. He shuffled through his stuff and rooted around in areas that he thought someone might hide, even patting on top of his bed and walking all around the quarters to make sure that he didn't miss a spot.

When he came back out, Robin looked at him quizzically. "Maybe you should be listening for his movements in each room rather than trying to cover all the corners. He can't hide his noise."

"Ah, it's good that you said that, Robin-chan," he said before going into the next room. Even this strategy, however, took time, and it was almost forty minutes later when he had finished with the cabins and the kitchen, and he still hadn't even gone below deck.

This was about the time that Usopp had come back to the ship. "Hey! Where is everybody? Robin? Are you here?"

"Inside, Long Nose-kun!" Robin called.

Usopp peered around the door and came in. "What are you guys doing in here?"

"Some shitty invisible bastard got on board," Sanji said wryly, lighting another cigarette.

"Invisible?" Beads of sweat began to form on Usopp's brow.

Sanji drew from the cigarette and exhaled as he put out the match. "And it's taking forever to find him. Robin-chan, are you sure he's still inside?"

"Yes. I would have heard him if he tried to sneak past me. He must be below deck."

Sanji nodded. "Very well. Usopp, come on and help me look for him downstairs."

"What? Why me?"

"Because it takes too long for one person to do it, and Robin-chan shouldn't be in harms way, especially after all that she's experienced recently. Now come on!"

Usopp sighed and followed the cook down the stairs. They began to look through the rooms like before separately, calling to each other when they were certain that the room they last looked in was clear.

The last places to look were the pantry and the cargo hold. Sanji, of course, wanted to look through the food and make sure that nothing was bothered, so Usopp was left with the task of checking the cargo. Usopp grumbled at his misfortune and entered into the hold, since he knew that it'd be necessary to make sure that nothing important was stolen even if he didn't find this invisible man.

He entered into the hold and patted around for the light. It was always a little harder to find in the cargo hold it seems, so it took a little bit. When he found it, he muttered "Finally," and flipped it on. But when he turned around, he noticed that there was something wrong. "I would have sworn that there were more supplies here… Maybe he came to steal cargo? But does that mean that he already got away…?" He walked over towards the area that he was sure there was a box before.

"Chika Chika no Blackout…"

The lights abruptly cut out, leaving Usopp blinking in the darkness. "Agh! Damnit, Franky! I thought you said that the wiring was perfect!" He complained aloud, attempting to keep himself from panicking in this situation. There was a good chance that this guy was in the room, since he thought he heard a voice… and wasn't entirely sure, but he felt he could hear someone breathing as he approached. He thought briefly about calling Sanji to come in as well.

"Chika Chika no Genzou…"

"YAAAAAAAAGGGHH!" Usopp's scream rang through the decks. Sanji dropped the food he was inspecting and from the pantry to the cargo space. He found Usopp on the floor, twitching and foaming from the mouth, his eyes blank.

"Usopp!" Sanji knelt down and pulled him up by the shoulders. "What happened?"

"G-ghosts… M-mo-monster…" Usopp choked out.

"What? What are you trying to say?"

"A… monster appeared…"

"A monster? Are you sure? Robin-chan said that it's probably a devil fruit user."

"Chika Chika no Genzou…"

Sanji heard the voice and looked up instinctively to find the speaker, and then he dropped his cigarette from his mouth. A large red oni was towering above him and shadowing him, holding a huge iron club over its shoulder and scowling down with glowing, orange eyes.

His eyes widened and he clenched his teeth as he stepped back. "What the Hell is that!"

The oni moved to pull its club back, and it brought it crashing down at Sanji. The cook was so stunned that he had backed himself against some barrels, putting himself in a position that he couldn't dodge the attack from. He clenched his eyes and prepared for the blow to hit him.

But it never hit. He opened his eyes again, and the oni was gone. The lights had turned back on as well.

He didn't waste any time to think. Sanji immediately grabbed a hold of Usopp and ran out of the cargo hold, slamming the door loudly behind him. He leaned back against it and exhaled.

Robin had already come down the stairs when she heard Usopp's scream, and she sat before the two. "Cook-san, what happened?"

"That invisible man seems to be able to summon demons or something," Sanji sighed. "I don't know. But whatever that thing was, it's still in there. We'll just keep the door closed until the others come back."

She looked over at Usopp. "And Long Nose-kun?"

Usopp finally got over his temporary inconvenience of fear and sat up on his own accord. "I'm fine… I didn't get hurt or anything." He wiped his brow with his forearm. "But if he's able to summon demons, what makes you think that we can keep him from having one bust through the door?"

Sanji scowled. "I guess we're just going to have to hope that he doesn't. Robin-chan, are you sure that it's a devil fruit user? Are there any devil fruits that can turn someone into a ghost and interact with other ghosts?"

Usopp complied. "Is there a Bake Bake no Mi or something?"

Robin shook her head. "Not that I know of, but whatever he is, he can't go through walls, and he still makes noise even though he's invisible. And I think I heard him say an attack name before he tried to blind me earlier…"

"Ahh! He tried to hurt you, Robin-chan? That bastard! How dare he do something like that!"

Usopp looked over at Sanji incredulously. "Oi."

Nakama – You should know what this term means by now!
Rumyers – I took it from "Myers's Rum"… which I'm running out of. –taps bottle-
Metsubushi – Something thrown into one's eyes in order to blind them.
Genzou – Phantom, illusion, vision.
Bake – From "obake" and "bakemono" (both mean basically "ghost")
I know that it looks more likely for Franky to join… but I still want it to be Paulie! He's like… anti-Sanji… and that amuses me.
Or Lulu! Ah… that'd kill me for sure.