In earlier time periods, like the medieval times of the wizarding world, their relationship might be more formal at first. They'd be outsiders in that time, so they'd rely on each other more. Fleur's Veela charm might be seen as more of a novelty or even a threat in that era, which could make Harry more protective of her. This would strengthen their bond.
When they travel to a future time period in the wizarding world, they might find that the roles have reversed in a way. They are now the ones with knowledge of the past, and the younger wizards and witches look up to them. Their relationship would be more of a guiding one, both for the new generation and for each other as they adapt to this new future world. Their love would be based on shared experiences and the wisdom they've gained from their time travels.
In the past, Luffy would likely be even more of a novelty. His fearless and somewhat naive attitude would stand out in an era where pirates were perhaps more cutthroat and calculating. He might bring a sense of hope and a different way of thinking to those around him. Law, in the past, could be seen as a bit of an enigma. His quiet and strategic nature might make him seem like a dangerous wildcard. In the future, Luffy could struggle to adapt to new social norms, but his unwavering loyalty and determination would still shine through. Law might be more intrigued by the future's medical advancements and would be eager to learn and incorporate new knowledge into his own skills.
His combat abilities might be overpowered in some earlier time periods where the fighting styles are less developed. For example, if he travels back to a time when lightsaber combat was more rudimentary, his advanced techniques could make him seem like a god of war.
Natsu, being his impulsive self, might initially have a hard time adjusting to more reserved time periods. For example, in a time when magic was more secretive and not used so openly, he might constantly be getting into trouble for showing off his powers. Ultear, on the other hand, who is more calculating, might find it easier to blend in. But in a more chaotic time period, like during a war, Ultear's calm demeanor could be shaken as she has to face more extreme situations. In a peaceful future time, Natsu might become more laid - back as there's no need for constant fighting, while Ultear might feel a bit out of place without her usual problems to solve.
In a time period during the height of the Covenant War but in a different theater of war, his abilities would be put to different tests. He might face different Covenant species or new strategies. His ability to adapt and his leadership skills would be crucial. His physical abilities would remain a great asset, but he'd have to use them in new and creative ways to deal with the changing battlefield dynamics.
If they travel to a time when the Quincy and Soul Reapers were at peace, their relationship could develop in a more carefree way. They could explore the different cultures together without the threat of war. However, if they go to a time when there was a great divide between the two groups, they might have to hide their relationship or even be on opposite sides at first. But as they discover the truth behind the conflict, they could work together to bridge the gap, which would enhance their relationship. In a time closer to their own but with some changes, like if Ichigo was more powerful from the start, Rukia might have a different kind of admiration for him, and their relationship could shift from a more mentor - student type to a more equal partnership faster.
If Natsu travels to a time when Fairy Tail was just starting, he would be more eager to prove himself. His competitive side would be even stronger. In a more distant past, like when dragons were still around, he might be more in awe and a bit more reserved as he encounters these powerful and mysterious creatures. In a future where magic has evolved, he could be a bit out of place at first, but then adapt and become more open - minded to new forms of magic.
In the past, their relationship could be shown as it was originally, full of rivalry yet an underlying respect. When they travel to the future, they might see how their actions in the past have influenced the current state of the ninja world. For example, if their enmity led to certain clan rivalries still existing. They could then work towards mending those relationships.
When traveling through time, they may encounter versions of themselves or their families at different ages. For instance, meeting their younger or older parents could give them new perspectives on their own relationship. They might learn things about their families' pasts that change the way they interact with each other in the present - day of their original time.
In the past, Tom's magical abilities were already quite strong even as a young student. His natural talent for magic was evident. However, if Harry travels back in time, he would bring with him the knowledge and skills he has learned in his own time. So in terms of spellcasting knowledge, Harry might have an edge as he knows spells that were not yet invented or commonly known in Tom's time. But Tom's raw power and his understanding of magic from his own era's perspective would be formidable.
Judy Hopps, being an adaptable bunny, would likely quickly adjust to different time periods. In the past, she might be initially shocked by the more primitive ways but would soon use her problem - solving skills. For example, if she went back to a time before modern technology in Zootopia, she could use her natural instincts and basic tools to get by. Nick Wilde, on the other hand, would probably rely on his charm. In a more old - fashioned Zootopia, he might use his smooth - talking to blend in and find his way around.