In the manga by ONE PIECE There was that moment when Hyo teaches Haki to Luffy in Udon Prison during the fight Queen is entertaining, a moment that was also recently achieved in the anime. But as readers know, there is a very special character in prison who has decided to use Luffy for his personal strategies.
This pirate is caribou, the man who had already distinguished himself as one of the most dangerous in the Shabondy Archipelago. During the previous sagas of ONE PIECE, he had no luck between the island of the fish people and the first meeting in the mini-adventures with Kaido's crew. For this he was imprisoned in Udon as the protagonist of the manga.
But during Wanokuni's second act, as you may recall, It was useful to turn off all Lumakophones from the island by hiding it in your body thanks to the power of your devil fruit. But after these moments, although he is certainly not a weak pirate, he was completely broke and does not seem to have appeared in Onigashima for the time being.
Dear, He did not appear in the entire third phase of this ONE PIECE saga. What plans does Oda have for the character? Since it is no longer necessary to keep communication between Onigashima and Wanokuni separate, it would be pointless to leave the character on the main island and not let him take part in the battles against Kaido's crew. However, there is no trace of the various ships that set sail from the docks. He certainly didn't appear in the fake ONE PIECE 988 spoilers.