In the past, their relationship could develop in complex ways. At first, they might be a bit lost and cling to each other for a sense of familiarity. As they get involved in the events of the past, they could start to see each other in new lights. Maybe Elizabeth discovers a more heroic side of Merlin as he uses his magic to protect them. And Merlin could see Elizabeth's adaptability and courage as she navigates the strange social rules of the past. This could lead to a deeper emotional connection between them.
At first, it might be very hostile. Morgana's resentment towards Merlin for his loyalty to Arthur could still be there. But as time passes, they could start to see each other in a different light. Maybe they begin to respect each other's immortality and the unique perspective it gives them on the world.
At first, their relationship might be one of master - servant formality. Shirou would be cautious and respectful, while Merlin would be somewhat aloof. But as time goes on, Shirou's determination and pure heart could win Merlin over. Merlin might start to see Shirou as more than just a master, but as a friend or someone worthy of his real help.
In the fanfiction, their relationship would be a complex journey. Since they are from different eras in a sense, they have different values and ways of thinking. However, being in the past together forces them to communicate and work as a team. Harry might initially be distrustful of Tom because of his Slytherin nature. But as they experience things like the old magic of the past, they begin to understand each other more deeply. They might start as reluctant allies but end up as true friends who have changed each other for the better. For example, Tom could learn more about the importance of love from Harry, and Harry could understand the allure of power from Tom without being corrupted by it.
In the past, they could meet their parents at a younger age. This would give them new insights into their families and how they came to be. It could also make them more appreciative of each other. For example, Percy seeing his mother before she had to endure so much, and Annabeth understanding more about her family's past. All these experiences would add new layers to their relationship.
Their relationship might start with distrust. Harry, like Arthur, may be wary of Draco, as Merlin, due to their past differences. But as they face common enemies, they begin to rely on each other. Draco's magic skills, similar to Merlin's, prove useful to Harry, and they gradually form a bond of friendship and mutual respect.
If they travel to the past, Kakashi might see Sakura in a new light. In their original time, he saw her as a student, but in the past, she could show different skills and a more mature side, which could make him respect her more as an equal. Their relationship could become more of a partnership rather than a teacher - student dynamic.
Their relationship could start with hostility. Hermione, being a Gryffindor, might be initially suspicious of the past Slytherin. But as they get to know each other better, they could develop a grudging respect. For example, if they are forced to work on a project together in the fanfiction, they find that each has unique skills to contribute.
One idea could be that Merlin and Elizabeth go back in time to Camelot's golden age. They could use their modern knowledge to solve ancient problems. For example, they might introduce new medical techniques that save lives. Another plot could involve them trying to prevent a major disaster in Camelot's past that they know about from history books. They might also have to deal with the cultural shock of living in a different time period.
In the past, their relationship could be more complex. Kakashi might be suspicious of Naruto's sudden appearance and his knowledge from the future. Naruto would have to prove himself to Kakashi. However, as they work towards a common goal, like saving Konoha from a threat in the past, they would gradually build trust. Their relationship could also change in terms of how they interact with others in the past. For example, they would need to pretend to be normal villagers or ninjas from that time, and this new situation would impact how they relate to each other.
At first, they'd probably be very cautious around each other. Percy is used to being around his friends at Camp Half - Blood, and Artemis is very protective of her solitude. But as they face challenges in the past together, they'd start to respect each other more. Percy would see Artemis' wisdom and power, and Artemis would come to appreciate Percy's courage and loyalty. Eventually, they might form a deep bond of friendship, or perhaps something more, as they rely on each other to survive and change the past in a positive way.