The relationship between the Black Knights and Lelouch would also change. If Lelouch goes back in time and is more strategic from the beginning, the Black Knights might be more unified and loyal to him. They would see his long - term vision more clearly and be more willing to follow his every command, which could lead to a more powerful and efficient resistance against Britannia.
If Walter goes back in time, his relationship with Skyler would be completely different. Instead of lying to her about his meth - making activities, he would be honest and they could build a more trusting relationship. They might even have a normal family life without all the secrecy and danger.
Lelouch's character would likely become more cautious. Knowing the consequences of his past actions through time travel, he might think twice before making rash decisions. For example, he might not be as quick to use his Geass power without considering all the long - term effects.
If ASL time - travels, Luffy's relationship with his brothers would be strengthened in new ways. They would have to rely on each other more as they face the unknowns of the past. For example, Ace might see a younger Luffy and be even more protective.
Lelouch is a very likely candidate. Given his intelligence and his desire to change the world, time travel could be a means for him to correct past mistakes or gain more power to overthrow Britannia. Another one could be Suzaku. He has a strong sense of justice and might use time travel to prevent some of the tragedies that occurred.
If Sakura travels back in time, her relationship with Sasuke would be very different. She could meet a younger Sasuke who hasn't been through all the traumas yet. She might be able to form a closer bond with him from the start and change his path. With Naruto, she could become a mentor - like figure if she travels to a time when he is younger, guiding him in a different way than in the original timeline.
His relationships with his guild members would also change. He could prevent some of their deaths or mistakes. For example, he might be able to stop Klein from getting separated from the group at the start of SAO. This would lead to a different dynamic within the guild, with more camaraderie and a sense of unity.
In a time - travel scenario, Anakin's relationship with his mother could be greatly altered. He could go back in time and save her from the Tusken Raiders. This would change his whole outlook on life and his path towards the dark side. Regarding his relationship with Palpatine, he would be aware of Palpatine's true nature from the start. So, he could either avoid Palpatine completely or try to expose him earlier. His relationship with other Jedi, like Ahsoka, could also be different. He could be a better teacher and mentor to her, as he has the experience of his future mistakes.
During time travel, Naruto might see Sasuke in a different light as they face historical events. Sasuke could also start to respect Naruto's leadership more. And Sakura, with her skills, would be more of an equal in their group. This could lead to a more balanced and harmonious relationship among the three. For example, in a time when they have to deal with a powerful enemy from the past, they'd have to trust each other completely, which would deepen their bond.
If Kakashi travels back in time, his relationship with his father would be completely different. Instead of the strained relationship due to his father's perceived failure, he could support his father and build a strong bond. With his students, if he travels to the future and then back, he might have a new perspective on how to train them. He could be more lenient or more strict depending on what he saw in the future of their development.
The relationship between C.C. and Rukia would be quite complex. C.C. has a very mysterious and detached personality, while Rukia is more duty - bound and has a strong sense of camaraderie. They could start off as rivals, both being strong female characters with unique powers. However, as they get to know each other's pasts and motives, they might develop a grudging respect. C.C. might be intrigued by Rukia's connection to the Soul Society, and Rukia could be curious about C.C.'s immortality and her role in Lelouch's life.