I don't own One Piece

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Old Man,
  First I am still a bit mad on the little stunt you and Yumi pulled. Though I suppose I can forgive you two, but next time we meet I'm kicking your ass. It's been a week since I've left, hopefully you haven't been overthrown by some random pirate crew. How's the bar doing without my help? I'll bet you'll run it to the ground in two months tops.
How's Jiro? I hope he's healing nicely, I can't imagine the island without the best doctor around. Tell him I said hi and that I hope he's feeling better. Don't tell Yumi I said hi. I'm still mad.
Katsu.

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Old Man!
   We just left this island which was amazing! Well sorta. It was amazing in the aspect I got to help kick some old pirate crews ass and I got to see some new material to sketch. You might remember them, the Silent Pirates? Yeah them. Well apparently they made a little home on their next island and the poor people lost their wonderful singing voices. They're weak though, the prince is working on strengthening their military now.
Speaking of weak, have you been sending me the weak pirates this whole time?! I thought I was stronger, but now I'm starting to think you've been setting me up. I really need to train harder to be able to stand with this crew!
Luffy is a monster. In both terms of how much he eats and how he fights, I don't think anything can knock this guy down. Other than that he's constantly commanding me to play games with him. He never runs out of energy. I'm still trying to find a way to get some peace while on the ship, that's when he's mostly rowdy. He's a handful. No, really.
You still haven't told me how Jiro's doing. I'm going to assume well. Chopper is a very good doctor and I have confidence that he patched him up perfect. Tell him I said hello. Also, tell Yumi I said hi and that I'm not mad at her anymore.
I'm still mad at you. Jerk.
Katsu.

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Geezer,
It's come to my attention that you won't be able to send a letter. Either because you won't pay extra money to try to locate our location, or it's just not possible. With that said, it means I can write anything down and you can't scold me. It'a not as fun without a reaction. Though I'm assuming if I told you how stupid you look with your eye patch, or how idiotic it is that you dye your hair to look younger (you don't by the way, baka) you would be red in the face while growling my name. That would be fun to see. I sorta miss that. Not really.
It's been a few days since the silent island and we've been stuck on the ship. I've remembered something else. Apparently I did spend some time with Shanks. Though I'm not positive of my relation to him.
This crew is rowdy. Scratch that, my Captain is rowdy, sometimes Chopper and Usopp can be loud too though. I've been trying to write this letter for three hours now. Luffy keeps demanding to play tag, then he wanted to play hide and seek. Which by the way Robin cheats at. Just like Luffy cheats at tag. Cheaters. Franky helps keep me sane, as he's let me take refuge in his workshop to sketch. It's where I'm hiding now so I can finish this letter.
Speaking of Franky! We're working on this really cool boat! Well he's building it, I'm just helping with some of the sculpting and painting. It's a surprise for the crew, I think it should be done soon.
Oh! Tell Yumi I said hello, and that I kinda miss her. I hope she's doing okay.
Also, I'm not mad at you anymore.
Katsu

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Old Geezer,
  First, I have no money management skills. And it is your fault. I am now in debt. To Nami. Yes, the navigator you took a shine to. I owe her money. She's greedy! In a scary way, believe me.
Oh!! Let me tell you something! You'll never guess what we saw earlier today! Or rather who we met. A skeleton. Like a live, talking skeleton, his name is Brook. Luffy has decided he's going to be in the crew. So I guess we have a new crew mate.
Also, I've remembered something else. I know who Shanks is to me now. He's my Uncle. It's weird to think he was a phone call away from you. But you could have never imagined I was his niece, right?
I haven't told you about Zoro, have I? Well, he has some monster strength. I was sitting in his training room with him earlier and I'm honestly surprised the ship is still floating with the weights he's lifting! I also tend to sit up with him during night watch, it's calming. He also speaks his mind, no sugar coating! I love it! Though I don't want to get on his bad side, he's probably as strong as Luffy. But he has swords so he's dangerous in a different way.
I feel stupid talking to myself. I wish you could write back. Whatever, it doesn't matter. Maybe these letters will annoy you, at least I would get something out of that.
Katsu
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Mamoru,
This crew is crazy and reckless. But I love my nakama. I won't go into all the details since I don't want to chance this letter getting into the wrong hands. At least that's what Franky and Robin are saying. You know that scar on my shoulder? Well they saw it. I thought they were going to hate me, but they don't. Hell, Luffy ordered them to forget it. Just to make me feel better.
Also, I'm working on getting stronger. I managed to take down some zombie with really fantastic shooting skills, but only barely. Of course when we were fighting Moria, I mean some random pirate I was knocked out. Luffy ended up beating him so it's all good. I need to train more though.
How's the bar? I bet it'a all run down now, unless Yumi is helping out. She probably is, she's always been the first to offer help. If you're still open it's only because of her hard work and charm!
I hope you're doing well.
Katsu

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End chapter 25! It's just a filler, but I wanted to write something... there will be more of these as the story goes on, maybe next time I'll add in something from Mamoru?

This is not edited.