For Erza, time travel could expose her to different cultures and combat styles from different eras. She might adapt some of these into her own fighting style, making her even more formidable. Also, seeing how things were in the past or future could make her more empathetic towards others. She could learn from the mistakes or successes of the past and apply them to her present self, becoming a better leader and friend within the guild.
Natsu's character could develop by learning more about the history of magic and his own dragon - slayer powers. In a time - travel scenario, he might discover new ways to use his magic or even find out some secrets about his past that were long lost. This new knowledge would make him more powerful and also more mature as he realizes the importance of certain things in the grand scheme of things.
For Natsu, time travel could make him more responsible. In a new time period, he'd have to be careful not to disrupt the timeline too much, which would be a big change for his impulsive nature. He might also gain a deeper respect for history and the importance of the past. For example, if he meets an ancestor of his, he'd start to see his family legacy in a new light. Wendy, on the other hand, could become more confident. She's often shy, but in a time - travel adventure, she'd have to step up and use her magic in new and challenging situations. This would force her out of her comfort zone and help her grow as a mage.
In the fanfiction, their relationships could develop slowly. Erza might start by being more protective of Natsu during battles. She has always been a strong fighter, and now she has an extra incentive to keep Natsu safe. Mirajane, on the other hand, could use her charm and her skills in the guild to make Natsu feel welcome and special. As time goes on, their feelings might become more obvious to other guild members, who could either encourage or tease them about it.
One great 'Natsu x Erza time travel fanfiction' is 'Time's Twist'. In it, Natsu and Erza are sent back in time due to a magical mishap. The story beautifully explores their relationship in a different era. They have to deal with the past versions of themselves and their guild mates while also trying to find a way back to their own time. It has some really exciting action scenes and heart - warming moments between Natsu and Erza.
One possible plot could be that Natsu and Erza are sent back in time to a crucial moment in the history of their guild. Maybe they go back to the time when the guild was first founded. They could end up having to protect the founders from a threat that was long forgotten in their own time. This would give them a chance to see how the guild started and also change some things for the better in the present.
Their relationship could start from mutual respect. They've been comrades for a long time. As the story progresses, Natsu might realize his deeper feelings for Erza during a particularly dangerous mission where he almost loses her. This realization could lead to him confessing his love, and from there, their relationship would develop into a romantic one and eventually marriage.
Their love develops gradually through shared experiences. For example, they might be paired together for a school project. At first, they struggle to work together because of their different personalities. But as they overcome the challenges, they start to understand each other better. Natsu learns to be more patient with Erza's perfectionism, and Erza learns to loosen up a bit around Natsu. This mutual growth brings them closer and their love blossoms.
The friends of Natsu and Erza would also interact with the baby. Gray might make little ice sculptures for the baby to play with. Lucy could read stories to the baby. They all would be part of the baby's life, helping Natsu and Erza raise it. And the baby would respond with lots of giggles and smiles to all their efforts.
Some fanfictions depict their relationship evolving as they participate in guild - wide events. For instance, during a festival or a celebration in the guild, they might have a conversation that reveals new aspects of their personalities to each other. Over time, these small interactions build up, and they become closer friends, or in some cases, the relationship might take on a more romantic undertone as the fanfiction writer chooses to explore that aspect.
If Jaune and Ruby time travel, Jaune might become more confident in his abilities. Seeing the past and how things could have been done differently, he could learn from his mistakes and grow into a more assertive leader. For Ruby, she might gain a deeper understanding of the history and the weight of her role. This could make her more determined and perhaps a bit more cautious as she realizes the consequences of every action.
Hermione's character would likely become more confident and assertive. Traveling through time with Sirius, she would be exposed to different situations that require quick thinking and bold actions. For instance, she might have to stand up to powerful wizards in the past without the safety net of Hogwarts rules. Her knowledge would expand as she learns from different time periods, making her an even more formidable witch.