If Arthur travels back in time and sees Merlin as a young boy, he might develop a more protective feeling towards him. He'd understand Merlin's journey better and their relationship would shift from just king - and - servant to something more like an older brother - younger brother dynamic. On the other hand, if Merlin takes Arthur to the future and shows him a world without Camelot, Arthur might feel a sense of loss and rely on Merlin even more for emotional support.
If they travel to a time when their family was intact, they might have a more carefree relationship. Without the burden of the family's fall and all the hardships they faced, they could be more like normal siblings, teasing each other and having fun together. But at the same time, they would know what is to come in the future, so there would still be a sense of responsibility between them.
Their relationship could also become more of a mentor - mentee type situation at times. If they travel to a time when one of them has more knowledge about what's going on, say Trunks if they go to a time related to his future knowledge, he could be like a mentor to Goten, guiding him through the situation. But then in other situations, Goten's natural fighting instincts might lead and Trunks would learn from him. This back - and - forth would change their relationship in a dynamic way.
It might also become more complicated. If they travel to a time when one of them was in love with someone else, like when Elena was still with Stefan in the past, it could create jealousy and confusion. They would have to face these emotions and decide if their current relationship is worth fighting for.
If they travel back in time, their relationship could become stronger as they rely on each other more. They already have a bond in their original timeline, but in a new and uncertain time, they'd have to trust each other even more. This could lead to them confessing their feelings earlier than in the original story.
Their relationship would likely become stronger. If they travel back in time, they already have the memories of their relationship in the future. So, Hinata might be more bold in expressing her feelings, and Naruto would be more aware of her importance to him from the start.
During time travel, they would rely on each other more. Kakashi would have to depend on fem Naruto's unique abilities and insights that she has gained in their original time. For example, if fem Naruto has some new jutsu or a different way of thinking about problems. At the same time, fem Naruto would look up to Kakashi's experience even more as they face unfamiliar situations in the past. This could deepen their bond and make it more of a mutual admiration and friendship rather than just a student - teacher relationship.
Their relationship could become more understanding. As they travel through time and see different events together, Luke would gain a deeper understanding of what led his father to become Darth Vader. Vader, in turn, might see Luke's unwavering hope and goodness more clearly, which could soften his stance.
Well, if Sakura and Kakashi time - travel, their relationship could become more equal. In the original story, Kakashi is Sakura's teacher, but in the time - travel scenario, Sakura, as an Anbu, has more skills and experience. They might start to see each other as true comrades, sharing equal responsibility in whatever situation they face during the time - travel.
Well, at first it would be very strange. Minato would be confused by this female version of his son. But as they interact more, if fem Naruto shows her familiar Naruto - like spirit, Minato would start to see her as family. He might become very protective of her in the past world, which is different from their normal father - son relationship.
Their relationship would likely become more complex. Since Harry has only known Lily through memories and stories, actually meeting her in person through time travel would be a shock. Lily would see Harry as a grown man, not the baby she left behind. They might develop a more equal, friend - like relationship as they face the challenges of the time - travel situation together.