Yeah, I'm not the GM, just a guy commenting on some of the more common-sense seeming problems of your sheets. For instance if Metal-Metal Fruit guy joined the Marines, you need to think of why he's gonna go be part of a pirate crew instead of wanting to hunt all of us down. I'm presuming the GM's own PC will either have had that figured out as part of the way they gained their devil fruit, or he really will be an enemy we have to fight in the future.