He could interact with Luffy. They both have a strong sense of justice and a love for adventure. Their meeting would be really interesting as they could exchange stories about their different worlds and fight side by side against the common enemies in Dressrosa.
Naruto might interact with Law. Law has his own plans and strategies, and Naruto's unpredictable ninja skills could either disrupt or enhance Law's plans. They could have some tense moments at first, but then come to respect each other and work together. Also, Naruto could interact with the gladiators in Dressrosa. He could learn about their code of honor and share his own ninja code with them.
In this fanfiction, Naruto would surely interact with the citizens of Dressrosa. He would befriend the children and inspire them with his tales of Konoha. He could also interact with the villains, like Doflamingo. Naruto would try to understand Doflamingo's motives, but ultimately oppose him when he realizes the harm Doflamingo is causing to the people of Dressrosa.
A great plot for this fanfiction could start with Naruto being summoned to Dressrosa by some sort of magic or strange device. Once there, he discovers the oppression by Doflamingo. Naruto, with his never - give - up attitude, decides to fight back. He starts training some of the weaker citizens in Dressrosa to use basic ninja skills like stealth and basic combat moves. His presence also gives hope to the rebels, and together they work towards overthrowing Doflamingo.
He could interact with Ruby. Naruto's energetic and positive nature would contrast well with Ruby's enthusiasm for being a huntress. They could learn from each other's combat styles, like Naruto showing Ruby some of his acrobatic ninja moves and Ruby teaching Naruto about using a scythe.
Definitely Ruby. She's the main character in RWBY, and Naruto would be drawn to her positive attitude and determination. They could learn a lot from each other. Naruto could teach her about the importance of never giving up like he did in his own journey, and Ruby could show Naruto how to use Dust.
He would be protective of the cat. Given his nature of always wanting to protect the weak, if any threats came towards the cat, Naruto would be the first to step in. He might also talk to the cat a lot, sharing his dreams and stories about his adventures, even if the cat couldn't understand his words.
In some fanfictions, Naruto may be in a battle and an angel comes to his aid. The angel could use its divine powers to protect Naruto from a powerful enemy attack. After that, Naruto would be curious about the angel and start asking questions. They could then form a bond where the angel decides to stay and help Naruto in his fight against evil in the ninja world.
In this fanfiction, Naruto would interact with Vesemir, the old and wise Witcher. Vesemir could see Naruto's potential and help him understand the history and traditions of the Witchers. Naruto would also run into the various monsters in the Witcher world. Instead of just fighting them right away, he might try to communicate with them first, like he did with some of the tailed beasts in his own world. His interactions with these creatures would be unique and could even change the way Witchers view certain monsters.
He could also interact with the scientists on Pandora. They might be interested in Naruto's abilities and study him. Naruto could in turn learn about their technology, which is so different from what he has in his own world. He might even help them solve some problems they have on Pandora using his ninja wisdom.
A gamer could interact by trying to form teams or clans in the Naruto world based on game concepts. They may look for characters with complementary skills to create the ultimate 'game - like' team. Also, they could introduce new forms of training that are inspired by game mechanics, like virtual reality - style training simulations.
She might interact as a mentor. Since Mikoto is from the Uchiha clan and has her own set of skills and knowledge, she could pass on some of that to Naruto. For instance, she could teach him about chakra control in a different way than he learns from Iruka or Kakashi.
I think Naruto would interact a great deal with Hinata. Hinata has had a crush on Naruto for a long time. In Team 8, she might be more open with her feelings. Naruto, being kind - hearted, would notice her kindness towards him. They could have some sweet moments together while also training and going on missions as part of the team.