Well, some characters might become closer. If they find that a fanfiction portrays their relationship in a positive and deeper way than the original, they could develop a stronger bond. For instance, two characters who were just friends in the original might see a potential for more in the fanfiction and start to explore that in their own relationship.
On the other hand, characters could become estranged. If the fanfiction creates a rift between them, like making one character jealous of the other in a new and untrue way, it could cause problems in their relationship. It's like a new idea is planted in their minds that disrupts the harmony they had before.
In a crossover, the relationships would be a complex mix. Consider a 'Twilight' werewolf in the 'Heroes' world. They might find kinship with characters who have animal - like powers. But at the same time, their territorial nature could cause conflicts. On the other side, if a 'Heroes' character with healing powers went to the 'Twilight' world, they could potentially change the fate of some characters. This would have a huge impact on the relationships within the 'Twilight' universe, especially for those whose lives are in danger, like some of the human characters in the vampire - werewolf conflict.
On the other hand, it could cause some tension. If a fanfiction misrepresents a particular relationship within the Cullen family, it could lead to some arguments or misunderstandings among them. For instance, if a fanfiction wrongly depicts the relationship between Edward and Bella in a way that the other Cullens find inappropriate or inaccurate.
If they read positive fanfiction about their relationships, it could strengthen their bonds. For instance, if the fanfiction emphasizes the love between Edward and Bella in a beautiful way, they might feel a deeper connection to each other.
Conversely, relationships could also be strained. If the fanfiction portrays a character in a way that another character doesn't like, such as making one character overly jealous or possessive of another in a way that goes against their normal dynamic, it could cause tension between them. For instance, if a fanfiction makes a brother - sister relationship seem romantic in a wrong way, it would create problems.
Their relationships might become a bit more self - aware. They could start discussing how they are perceived in the fanfic world, which might lead to them reflecting on their real - life relationships. For example, if a fanfic emphasizes a particular bond between two Cullens, they might pay more attention to that in real life.
If he's reborn as a vampire, his relationships would be drastically different. He might form new alliances with some vampires while being in conflict with others. For example, he could befriend Carlisle Cullen due to his kind nature, but be at odds with the Volturi. As for relationships with humans, he would have to hide his true nature, which could lead to some complex and strained relationships. He might be drawn to Bella Swan because of her connection to the vampire world, but also have to keep his distance to protect her.
Her relationship with her friends would likely become strained. They would be shocked and scared of her new demon form. For instance, Fluttershy might be too afraid to approach her. Pinkie Pie's usual bubbly nature might be dampened as she tries to figure out how to deal with this new Twilight.
Well, some relationships might become stronger. For example, Thor and Rocket might bond more over their shared experiences in Endgame. They could start to rely on each other even more in future battles.
Harry might gain a new perspective on his own heroism. He could see how others view him as this super - heroic figure and might feel a bit pressured to live up to those expectations even more. Or he could also realize that he doesn't have to be this perfect hero all the time as the fanfiction might have some versions of him that are more flawed.
Some might gain new perspectives. For instance, if a character reads a fanfiction that explores a different side of a conflict in Middle - earth, they could start to see the situation from a new angle. Maybe they realize there are more gray areas than they thought.