The Hyuga clan members would be very confused by 'Hanabi' (really Naruto). They would notice her (his) un - Hyuga - like behavior and attitude. For example, Naruto's loud and friendly nature would be a stark contrast to Hanabi's more reserved Hyuga self. As for Naruto's friends, they would be puzzled by 'Naruto' (actually Hanabi). They would wonder why he (she) seems a bit different in combat and decision - making.
If we swap Star and Marco, then the main antagonists could be those who were previously minor annoyances for the other character. For example, if Marco is now in Star's role, Ludo, who was a main antagonist for Star, could be an even bigger threat as Marco might not have Star's natural magical intuition to deal with him.
If the grandfather is very warm and accepting, Shikaneji would feel relieved and happy. They might open up more about their relationship and their dreams. Nejire could start chatting excitedly about their future together, and Shinsou would relax and join in the conversation more. However, if the grandfather is not so friendly, they would be disappointed and perhaps a bit defensive.
For the older generation like the Third Hokage, watching an AU fanfiction might make them regret some of their decisions in the original story. If they see an AU where they handled things differently and it led to better outcomes for the village and its people, they might feel a sense of remorse. This could then affect how they interact with the younger generation. They might be more open to new ideas and less set in their ways, which in turn could improve their relationships with the likes of Naruto and his friends.
Well, perhaps in this swap AU, their powers are also swapped. Star has Marco's karate skills enhanced to a supernatural level, and Marco can now use Star's wand and spells. Also, the relationships they have with other characters could be reversed. Their friends might react very differently to this new 'them'.
One great 'Female Naruto Shikamaru AU' fanfiction is 'The New Path'. In this story, the female Naruto has a completely different dynamic with Shikamaru. It explores how their relationship might develop in an alternate universe where Naruto is female. The characterizations are really well - done, staying true to the original personalities while also adding new twists due to the gender change.
He could meet an AU version of Hinata who is more assertive and outgoing. Maybe she's a powerful ninja in her own right and not as shy as in the original story.
At the moment of the body swap, Aladdin would likely be stunned. He'd be like 'What just happened?' as he looks down at his now - female form. He might feel a bit self - conscious about the new body and the different clothing. Jasmine would be equally shocked. She might be more vocal about her dismay, exclaiming something like 'This is unacceptable!'. But then, being the strong - willed character she is, she'd quickly compose herself and start to assess the situation, thinking about how to get out of this predicament while also trying to understand what Aladdin usually goes through in his daily life.
One possibility is that Naruto enters an AU where chakra doesn't exist. Instead, there are other forms of power. He would have to learn how to use this new power from scratch. Also, the relationships between different ninja clans could be very different. Naruto might end up making new alliances and enemies based on this new dynamic. This could be a great opportunity for character development as he faces challenges that are completely different from what he's used to in his original world.