@zieg
Quick thoughts on Jinbe finally becoming a member of the Straw Hats, I hope this isn't a flash in the pan membership , hope that he is there when they reach Rafael.
He is a character that got mentioned all the way back the early chapters he is actually the second Shichibukai we learn about after Mihawk.
He was opposed to Ace's execution and found himself in Impel down for him where he was a key factor in Luffy's breakout and also he saves Luffy's life are Marineford and helps him get over the grief of losing Ace.
Luffy repays this by essentially saving Fishman Island from Hody Jones and challenges Big Mom's sovereignty over the island. Not to mention Jinbe saves Luffy's life in Fishman island as well , they characters have a good written history and Jinbe is something they don't have, a Fishman that bridges the gap between humanity and Fishman.
One thing I look forward to seeing is when the Straw Hats meet the revolutionaries and Jinbe sees the good that Koala can do which only happened because Fisher Tiger saved her life.