The relationships would develop very differently. Naruto's time travel gives him an advantage in understanding the characters better. He can anticipate Sakura's needs and wants before she even realizes them. This would make their relationship more intimate faster. For the other characters in the harem, they would all be vying for Naruto's attention in different ways. Some might use their skills as ninjas to impress him, while others might rely on their emotional connection. Sakura, on the other hand, might have to step up her game and show Naruto that she is the best choice among the harem. This would lead to a more dynamic and interesting set of relationships compared to the original Naruto storyline.
The relationships in these fanfictions often develop through shared experiences. Maybe Sakura and the characters in her 'harem' have to fight together against a common enemy. This can bring them closer and make their feelings for her deeper. Also, some stories might have a more comical approach where misunderstandings lead to the development of relationships. For example, a character might misinterpret Sakura's kindness as romantic interest, and this starts a whole chain of events in the relationship development.
If Naruto had Saiyan heritage, his character would develop with a new sense of pride. Saiyans are known for their warrior spirit, and Naruto might become more focused on proving himself not just as a ninja but as a Saiyan - ninja hybrid. He could be more reckless in battle, relying on his newfound strength, which would force Sakura to be more of a voice of reason. Sakura, on the other hand, might develop a bit of envy if Naruto gets all these cool Saiyan powers at first. But eventually, she could use it as motivation to train harder and develop her own unique skills.
For fem Naruto, traveling through time might make her more aware of the long - term consequences of actions. She might become more cautious and strategic, as opposed to her impulsive nature in the original timeline. Gaara, on the other hand, could become more open and trusting. Meeting different versions of people from the past might show him that not everyone is out to get him. He might also develop a better understanding of his own powers and how they fit into the grand scheme of the ninja world's history.
She would be more confident. Since she has the knowledge of her future self, she would know her potential and not doubt herself as much as she did when she was a genin originally. For example, she would be more assertive in battles and in her interactions with her teammates.
Naruto's character might develop by becoming more aware of his feelings for Sakura earlier in the time - travel scenario. He could become more confident in expressing his love. Sakura, on the other hand, might develop a deeper understanding of Naruto's past struggles and grow to love him even more. For example, if they travel back to his early days at the academy, she could see how lonely he was and be more empathetic.
If they travel to the past, Kakashi might see Sakura in a new light. In their original time, he saw her as a student, but in the past, she could show different skills and a more mature side, which could make him respect her more as an equal. Their relationship could become more of a partnership rather than a teacher - student dynamic.
Definitely Sasuke. Their relationship has always been complex and full of unspoken feelings. Naruto is also a strong contender as he has always cared for Sakura deeply. Rock Lee might be in the harem too. His admiration for Sakura has been quite obvious throughout the series. And perhaps Kiba, who could see Sakura in a new light during the time - travel events. Also, an older or more experienced version of a minor character from a different clan might be attracted to Sakura's growing power.
Well, in time travel scenarios, their relationship can develop faster. Since they already know their feelings for each other (unlike in the original story where it took a while for Naruto to notice Hinata), they can start being more open. For example, Naruto might be more protective of Hinata right from the start, and Hinata could be more confident in showing her love for Naruto.
For Sakura, her character can be developed by showing how she adapts to the different time periods. In the past, she might be more naive compared to her future self. When she travels to the past, she could learn from her own experiences in the future and become more confident in using her skills. For Neji, if he travels to the future, he could be initially shocked by the technological advancements and different social structures. This could make him question his own beliefs and values, leading to growth in his character.
He would gain a deeper understanding of the history and the people around him. By experiencing the past first - hand, Naruto could see the motives and the struggles of the older generations. This would make him more empathetic towards characters like Itachi. He would realize that there were many hidden factors behind their actions, and this new - found understanding could shape his character into a more mature and complex individual. His relationships with his friends and allies would also be affected as he could share this new knowledge with them.