@Long:
The main things is people who could of joined but didnt, did so out of obligation for the most part
Luffy as we know would accept basically anyone who could hold their own
Carrot is probably most likely to be an 8th captain of the grand fleet or whatever, there's no way to be 100% sure until wano is over since she and the gang will rendezous with zoro and start gunning for kaido, she doesnt have enouh buildup rn but she could in the future.
Im still thinking its a lot more likely she doesnt join but she has me going hmmm alot
Oh, I see. Yeah, I see her more being part of the fleet than anything honestly. As for captain, that I don't know, but I would think it be the top two leaders of the Mink Tribe, as in Inuarashi and Nekomamushi being the captains of the fleet, and not Carrot.