Not telling yet

Oh, I think that's the ultimate activist's motive! Maybe because she wants to save the sea creatures, but the mastermind will hurt the dolphins if she doesn’t kill someone?

Since you were the first commenter, I’ll give you the first motive:the dolphins native to the area

Nice prediction, you’re partially right.I’m still working on the prologue

I feel like the ultimate Activist, Haki, might be one of the culprits? Maybe she kills the ultimate professor?