(Y/n)'s P.O.V

Very soon the ship descended into the Euphotic Zone and were about to be out of another level called the Disphotic Zone, about 1000 meters below the surface.

While we were sailing, the Caribou pirates ship is quickly approaching Thousand Sunny from behind, being towed by a sea monster. Caribou is heard, rallying the crew, getting them ready for their upcoming attack, and planning to make himself famous to the world by taking the Straw Hats' heads.

Back on the Sunny, while everyone was relaxing, Usopp saw something gaining on us. He started freaking out which grabbed our attention. "Guys! there is a shadow heading directly toward us!!"

My eyes widened, remembering that scene. I smirked a bit and went back to where I was seating. Let's the show begin!

Caribou's ship soon catched up and came along side the Sunny. Zoro glared at the ship with suspicion and grabbed wado.

Caribou leads the assault and the sea monster became visible to everyone none the ship. I looked at the strawhats expressions and saw how confused they were, expect Nami who recognized the monster pulling the mysterious ship.

"Is that Momoo?! The pet sea cow of the Arlong Pirates?!" She gasped, After hearing his name, Momoo saw Nami, Sanji and Luffy, remembering all three of them from the past. Immediately, he remembered the beatings he received from the two barbarians and started crying. Momoo decided to flee, swimming back the opposite way out of terror and towing the ship with him.

Only Caribou was able to make it onto the Thousand Sunny's deack.

"What's wrong with him?" Sanji and Luffy looked at Nami confused.

By now I was on Sunny's grass laughing. The terror on Momoo's beast face was hilarious! Brook and Franky found also found it funny and joined my laughing session on the grass.

Caribou, unaware he was left behind, stood up commanded his crew to slaughter all the Straw Hats. Zoro's face darkened after hearing his words and slowly walked towards him. Caribou saw the swordman advancing, already in his predator's mode. He gulped and looked around at his crew but found no one. "Oh... Shit..." He whispered.

Franky appeared behind him and picked him up with one hand. "So, you want to slaughter us, huh? That's a SUPER~ big mistake bro." He pointed one of his cannons at the screaming pirate, who started begging for his life.

"Please! I'm begging you! Don't throw me into the ocean! Spare my life!" Caribou cried. Franky, instead, simply throwed him against one of the side rails of the ship with a sigh.

"I'm not the captain of that crew I swear! I'm just a human bullet for the crew! I was kidnapped by them and they tortured me!" He cried even more when Sanji walked towards him. "What a coward."

"C-can I rode with you f-for a-a while!?!!" Caribou gulped. 'please say yes. Please say yes!'

"You can stay with us!" Luffy replied smiling at the stranger. "You idiot!!" The scared trio punched him while Zoro shook his head and went to get a rope to Tie the man up.

"W-well, that was interesting." I giggled. "Right Brook?"

"Yohohohohoho~~ you're right (y/n) san." Brook replied.

....

"Can I see your panties?"

*BAMB!!!*

****

Back on the Sunny, Caribou was  reworking his plan. Since he could get out of the ropes any time he pleases and since he could not fight nine people at once, he thought it would be best to observe the crew and wait for a chance to kill them one by one.

Already knowing what he was thinking, I sat near him along with Zoro and together we began observing his every move, without him knowing about us.

Luffy asked if it would not be faster to travel in a straight line, but Nami explained that if they continued straight, they would just be swallowed up by currents and could hit a volcano or sea mountain before finishing their descent.

"That would be a very quick death, don't you think Usopp San?" Robin grinned a bit at the terrified 'great warrior of the sea'. The poor man was shaking and breathing heavily. "Please Nami!" He yelled. "Don't even listen to Luffy! And please Robin stop saying scary things!!"

"Y-yeah! I'm so a-afraid!" Chopper ran to where me and Zoro were sitting for safety. "Aw~ you poor thing~!" I hugged the cute doctor and patted his head. "I'll protect you from the mean Robin. Okay?"

"Saying this won't make me feel safe you idiot~!" Chopper blushed and jumped around. 'he's so cute!' I thought blushing lightly as well.

"There is only one safe route." Nami said. "Everyone, put on a coat. The journey would get a lot colder, don't forget that the water in the deep sea is very cold." She warned us.

"The colder levels have what are called Deep Currents: large ocean currents normally invisible to the naked eye that move in a completely different pattern than surface currents." Brook added. "I had heard that the Deep Currents move very slowly across the ocean floor. Once someone is down that deep, it could take nearly 2000 years to return to a part of the sea that gets sunlight."

"In order to get there, we need to ride a descending current that takes us from a surface current to a deep current." Nami crossed her arms and looked outside the giant Bubble around the Thousand Sunny.

Suddenly, Franky called to her from the bow of the ship, saying "it" has come into view.

Everyone went to the bow. Luffy asked what the current looks like. Franky, in response to seeing it, said "Mother nature really knows how to get things done", the great Downward Plume.

We all looked at it in awe...

Caribou, who had been quiet the whole time, stood up and told the Straw Hats to turn back immediately. "Something bad is going to happen!" He yelled.

"Guys!" Luffy grinned. "There's a sea monster down there!" He laughed. "And it's so huge!"

"Wait, really?!" Nami and Franky eyes widened while Caribou yelled even more. "I have never heard of any type of sea monsters living in a place like the Downward Plume! This is impossible!!"

The moment he said these words, a giant octopus immerged and wrapped itself around the Thousand Sunny. I gasped in shock and took a step back. This is so... So... Incredible... seeing the confused look on the my crew faces, I decided to share my knowledge with them.

"This monster is called Kraken, a giant, mythological octopus. It can crush multiple ships in a single blow," I explained. "It must have been staying here, feeding on the ships that traveled here in the past few days." I said. The crew nodded their heads.

Luffy, not intimidated by its massive size and appearance of Kraken walked towards it, still grinning like an idiot. "I'm going to tame it then! Shishishishi~!"

"WHAT?! ARE YOU CRAZY!?!" Everyone except Robin, Brook and I started punching Luffy and shouting at him. "YOU STUPID CAPTAIN!!"

Suddenly, Caribou's ship returned with his twin Coribou and the rest of the crew, including Momoo. They were determined to save their Captain Caribou. However before they could get close, they were grabbed by one of Kraken's tentacles who quickly destroyed their coating bubble and their ship, making Caribou's crew submerged in the water much to his dismay.

Oh, the poor things...

Kraken then set its sights on the Sunny. Luffy, Zoro and Sanji prepared to attack but Usopp stopped them. "Don't! You'll break holes in the coating bubble and we'll die!"

"I have an idea!" Franky said and activated the ship's Chicken Voyage to avoid some of the tentacles. Noticing that The monster Trio will not change their minds on fighting, Caribou came up with a suggestion.

And soon Luffy, Zoro and Sanji were in their personal coating bubble which Caribou called "Barefoot Coating", which was essentially man-made diving suits. Caribou told them they can now go fight without damaging the ship and can find their way back using a rope lifeline.

Usopp, at first complained about this, but when Caribou made it clear which would be better: fighting on the ship or away from it. Usopp agreed with the latter.

The "Monster Trio" left their lifelines behind as they felt it will get in their way. Kraken, the giant octopus attacked again to which Franky fired rockets from shoulders, repelling a tentacle.

Kraken attacked with another one but Chopper ate a Rumble Ball and went into Guard Point, protecting the ship. The Sunny is knocked back as a result toward a mountain. However, Robin managed to conjure two big hands and kept it from crashing.

Luffy went into Gear third and equipped a Busoshoku Haki hardening on his arm. However, as he was using it in the ocean, he was weaken as a result.

Kraken tried to grab the Captain of the strawhat pirates but Sanji dashed toward it outside his bubble. He then hits the octopus with a Diable Jambe. Zoro went in next and cut off one of Kraken's tentacles into six pieces.

"Hey! You're gonna take off all its legs!"Luffy complained to the two. "Gomu Gomu no..." He smirked.

"Elephant Gun!!" Luffy attacked the giant octopus with his deadly attack, which made Kraken unconscious.

While The group on Sunny cheered for the trio. I noticed a large shark with a shirt on swimming around the now unconscious Kraken. Before I could inform the crew, we were all swept up in the current of the Downward Plume and pulled further down.

Franky, with Nami's navigation, managed to keep the ship from crashing, but sadly the Monster Trio ended up separated from the ship...