My question to all those people arguing over shirahoshi and her power.
First of all, isn't it kind of the fishfolk's goal right now to leave fishman island and migrate to the SURFACE? So isn't talk of Big Mom and all other factors regarding fishman island kind of pointless?
Next, Shirahoshi is not only an ancient weapon, she is also a GIANT MERMAID, who is attractive. Recall Mr. Caribou and his comment on her worth. Even if people don't know that she is an ancient weapon there are still many who would go after her for just the slave trade. Now if she ever needs to defend herself, there is again another chance at her "secret" getting out.
Next Wadastumi or whatever his name is, is also free, somewhere in the world. Not hard to imagine that he might mention her to someone wherever he is, whether its a marine, a pirate or who knows. 30,000 humans. Do they know? who knows, but its more likely that 1 out of those 30,000 know versus expecting 0 out of 30,000 knowing. It actually really unrealistic that every single one of those people are just clueless to this. But lets say they are. All it takes is ONE of those 30,000 people's accounts to reach the garousei's ears. If they do indeed no anything about the ancient weapons, they will instantly recognize that multiple sea kings all magically stopping the giant ship noah as there being the ancient weapon again alive in this world. Also the king, the princes and basically all the royal guard and all those by the kings and stuff know as well. Some could let slip sometime and a normal fishman hear and then slowly the rumor starts. BASICALLY, to expect her power to remain secret until said time when Luffy needs it or whatever is super rediculous, and at no way realistic.
So what is shirahoshi going to do? Is her people going to migrate to surface? Is she going with? Is she staying back at fishman island? Is she more free now or now that her secret "may" be out there will she be locked in tower AGAIN by her family for her protection. Will she be out perfecting her skill and talking and what not with sea kings? Will she get a royal guard, can they all be trusted. Look at HOdi, he was a royal guard once. What about Caribou, whats he all know, who is he going to tell, will he come back for her, is he still there, ect.
There is a billion things to wonder about her. SHE IS NO HANCOCK. It isn't as simple as just leave her be at fishman island and all will be as was. Fishman island just had a HUGE EVENT. In hancock's case it was ONLY about her and whether she was found out or not, her island had no part in anything. That is not true in shirahoshi's case. They had a huge event that was not about shirahoshi at all, she only interviened at very end. There is these millions of signatures, the letter, the racism and so much more that to expect this to be like Hancock in any way is just rediculous.
I don't know whats going to happen, but if when the strawhats leave fishman island and nothing changes that is HORRIBLE writing. Fishman Island can not just go back to being exactly how we saw it when we arrived except now no fishman district but instead them now digging ditches. Also was Decken's crew put in prison? I know Decken was, HOdi, and Hodi's officers. But was Decken's? Cause if anyone knows about Shirahoshi's special power, it is them 100%, we know for a fact they know about her ability. They clearly said so when she used it 15 years ago or whenever that was.