Usopp's abilities would vary greatly in different time periods. In the past, his ability to create lies and bluff could be even more effective. People in the past might be more gullible compared to those in his own time. His slingshot could also be a novelty. He could use it to introduce new concepts of long - range combat. In a future time, his abilities would need to be upgraded. His slingshot could be enhanced with future tech. He might also learn new forms of combat and incorporate them into his existing style. His ability to improvise would be crucial in adapting to the new and often more dangerous threats of the future.
In the past, Usopp's abilities like his slingshot skills might be seen as more primitive compared to the advanced weaponry in his own time. But his creativity could give him an edge. For example, in a time when there were less advanced long - range weapons, his slingshot could be a very unique and effective tool. In the future, if he travels there, his abilities might seem obsolete at first. However, he could adapt by using his knowledge of old - fashioned combat and combine it with the new technology he finds.
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.
Well, he could time - travel to a point where the Straw Hats first formed but he's the only one who remembers the future. This would lead to some really funny and interesting situations. He might try to prevent some of the early hardships they faced, like the fight with Buggy. Or perhaps he travels to a time during the Void Century and discovers secrets that could change the course of the current One Piece world. He then has to figure out how to bring this knowledge back to his own time without causing chaos.
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.
In the era of the Old Republic, Starkiller's abilities would be quite different. The Force was more in tune with the natural order then. His raw power might be more subdued as he would have to adapt to the more traditional ways of the Jedi and Sith. For example, his lightsaber combat might become more refined in the style of the ancient Jedi, rather than his more aggressive style from his own time.
Luffy's rubber ability might not change directly due to time travel, but his understanding of how to use it could be enhanced. For example, if he travels to a time where there are different fighting styles, he could incorporate new techniques. Robin's ability to sprout body parts on any surface could be used in really creative ways. If they travel to a time with different architecture, she could use the structures to her advantage in combat or for exploration in ways she hadn't thought of before.
Sanji would go all out in cooking the most nutritious and delicious meals for Usopp to help him recover. He might also be a bit overprotective, not allowing anyone to disturb Usopp while he's eating. Chopper would be in full - on doctor mode. He'd be constantly checking Usopp's vital signs, giving him medicine, and trying to figure out the cause of the sickness. Robin would be quietly researching any possible cures or causes, using her knowledge of history and ancient texts.
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.
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 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.
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.