straw hats find out ace is luffy's brother

One possibility is that they gain a deeper understanding of Luffy's motives. For example, they might see his memories of making the promise to Shanks and realize how important it is for him to become the Pirate King. This could strengthen their resolve to support him even more.

The relationships will likely become more profound. For instance, Zoro might see Luffy's memories of believing in his strength even when others doubted, which could make Zoro more determined to protect Luffy at all costs.

It could be Chopper. Since Chopper is a doctor and Reiju has some medical knowledge, they might bond over sharing medical techniques and treating the crew's injuries. Also, Chopper's kind - hearted nature would make him a great friend for Reiju who might be used to a more cut - throat family environment.

If Naruto was raised by the Straw Hats, he'd probably be a very different person. He might be more carefree like Luffy. For example, he'd be used to the wacky adventures on the Grand Line. His ninja skills could blend with the pirates' combat styles, creating some really unique fighting techniques.

His personality would become more outgoing and adventurous. The Straw Hats' lifestyle is full of exploration, so Naruto would be more eager to take risks.

Well, as of the latest manga chapters, Yamato has indeed become a part of the Straw Hats. This decision brings new dynamics and adventures to the crew.

Yes, Jinbei does join the Straw Hats in the manga.

Yes, Yamato did join the Straw Hats. The decision was made to enhance the team's strength and add more diversity.

Ace would probably be angry at first. He doesn't want Luffy getting involved with such a dangerous person like Blackbeard.

Well, Naruto's ninja skills would blend in an exciting way. His speed and agility from being a ninja would be useful during battles at sea or on islands. The Straw Hats are all about teamwork, and Naruto's experience in team battles in the ninja world would add to that. His Nine - Tails chakra, if he could control it well, might give the Straw Hats an edge in really difficult situations. He could also use his transformation jutsu for undercover work or just for fun with the crew.