Well, his powers would also attract a lot of attention. Scientists in the past might be intrigued by his abilities and try to study him. This could either lead to a better understanding of superhuman abilities in that timeline or it could create chaos as different groups try to capture him for their own purposes. His presence could also inspire others to strive for greater physical abilities.
His powers would likely shock the past characters. They might see him as a great hope or a potential threat. If he uses his powers openly, it could change the way the Z - fighters train and view their own power limits.
Their powers could actually be beneficial in some ways. Boruto's ability to think on his feet and use his various skills could help in solving some past problems. Himawari's Byakugan could be used for reconnaissance in dangerous situations in the past. But they must always remember that any use of their powers could have a butterfly effect. So they would need to be cautious and consult with each other before taking any major actions with their powers.
Naruto's power of the Nine - Tails would be a major factor. In the past, the Nine - Tails was feared and hunted. If Naruto shows up with the power under control, it could change how people view the beast. His chakra reserves, which are huge because of the Nine - Tails, could allow him to perform feats that were previously thought impossible in the past, like quickly rebuilding a village or fending off a large - scale invasion on his own.
His super strength could easily disrupt the past. For example, if he's not careful while trying to stop a crime, he might accidentally cause more damage than good. He could break things that were important in the original timeline.
His powers might also influence the people in the past in unexpected ways. Maybe his dark chakra could seep into some characters and start to corrupt them earlier than in the original story. This could lead to new alliances and rivalries forming, completely different from what happened before. For instance, a character who was originally a hero could be turned into a villain because of Dark Naruto's influence.
His super strength could accidentally cause destruction in the past. For example, if he's not careful while saving someone, he might break a building that was historically important. His spider - sense could also give him an unfair advantage in situations where he shouldn't have such an edge, like in a simple street fight in the past.
Arya's skills would have a huge impact. Her ability to change her face would make her an extremely dangerous spy. She could go undercover in the Lannister court and expose their secrets. And her skills with Needle would mean she could protect important people. In a world full of political intrigue, her skills would rewrite the power dynamics in the past.
Their powers are quite strong. They could easily overpower many of the villains in the past. This might lead to a quick end to some threats that were difficult to deal with in the original timeline. For instance, if they faced Frieza in the past, they could defeat him without much trouble, changing the course of the Saiyan story.
Naruto's powers, especially his Nine - Tails chakra, could have a huge impact. He could use it to fend off stronger enemies much earlier. Hinata's Byakugan would give her an edge in predicting enemy moves. They could use their powers together to change battles that were originally lost. For example, Naruto could use his Rasengan more effectively with Hinata's support and knowledge from the future.
In this fanfiction concept, the interaction of their powers is quite interesting. Since Ichigo's power has evolved over time, his past self may have a purer, more instinctual form of his abilities. When they meet, the future Ichigo's power, which has been through more battles and growth, could act as a catalyst for the past Ichigo's power. It could be like a spark that ignites a new level of understanding and control for the younger Ichigo. On the other hand, the past Ichigo's power, which is still in a more nascent state, might reawaken a sense of rawness in the future Ichigo's power. This could lead to the discovery of new techniques or a different way of using his existing powers for both versions of Ichigo.