Well, in 1918, Bella would be exposed to a whole new set of challenges. She would have to adapt to the social mores of the time, which were much more strict than in her own era. This could make her more cautious and calculating in her actions. And when it comes to her relationships, she would form connections with people from a different time, which could change her view on love and friendship. Her experiences in 1918 could make her more worldly and less naive, as she has to navigate a world full of uncertainties and unknowns, and this would be a significant transformation for her character.
She could become more independent. In 1918, she would be in a strange time without her usual support system. This would force her to rely on herself more, making her stronger.
In this fanfiction, Deku's character development could be quite complex. Going back in time, he may initially be overconfident because he thinks he knows what's going to happen. But as he realizes that changing the past has unforeseen consequences, he becomes more cautious. He also might develop a deeper understanding of his friends and their potential, as he gets to see them at an earlier stage. He could start mentoring some of them, which would in turn make him more responsible and mature as a character.
Kylo Ren's character could develop in a more positive way. If he goes back in time, he might see the mistakes of the past and decide to be a better person. For example, he could see how the Sith's ways led to destruction and choose the path of the Jedi instead.
She might become more empathetic. Meeting people from the past, especially those who were suffering or in difficult situations, could make Serena more understanding. She could see the world from a different perspective and this would change how she interacts with others in her own time. For example, if she sees how people in the past fought for equality, she may be more involved in similar causes in her present.
She might become more confident in her earlier years. In the original story, Arya faced many hardships that made her grow in a certain way. But if she goes back in time, having the knowledge of future events, she could be bolder in her actions and decisions from a young age. For example, she might be more assertive in dealing with Sansa when they were kids, and not let Sansa's girly ways get to her as much.
She might meet some interesting characters from that era. Maybe she'll run into some early vampires or humans with unique stories. It could be a whole new adventure for her, different from her normal experiences in the present time in the Twilight universe.
Their relationship could start off as a mystery to each other. Bella is from the future and Elijah has no idea who she really is at first. As time passes, they start to trust each other. Bella might be attracted to Elijah's old - world charm and his sense of honor. Elijah, on the other hand, could be intrigued by Bella's different way of thinking. They might start off as friends, but slowly fall in love as they face various challenges together, like fighting off common enemies or dealing with the time - travel paradoxes.
Going back in time gives Severus the opportunity to develop a different relationship with power. In the original timeline, his pursuit of power through the Dark Arts and association with Voldemort led to many problems. But if he goes back, he could use his knowledge to gain power in a more positive way. He could become a powerful force for good in the wizarding world, using his intelligence and skills to promote peace and cooperation. His character would then be seen as a reformed and wiser version of himself, rather than the conflicted and often tragic figure he was in the original story.
Noctis' character could develop a greater sense of responsibility. Since he has seen the consequences of his actions in the future, he would be more cautious and calculated in his decisions when he goes back in time. He might also become more self - reliant as he realizes he can't always rely on the same people or circumstances. For example, if he lost someone important in the future due to his actions, he would be more independent in his choices to prevent that loss again.
He would likely become more cautious. After experiencing such tragedies in his first 'life', he would think twice before making hasty decisions. This could make him a more calculating and less impulsive leader.
His character could become more humble. Going back in time and seeing the past versions of people and events might make him realize how much he has changed over the years. He may also become more cautious. Knowing the consequences of certain actions from his original timeline, he'll be more careful with his decisions in the past. For example, he might think twice before revealing his identity as Iron Man too soon.