They might start to see new possibilities for themselves. If the fanfiction shows a character achieving something they hadn't thought of in the original story, it could inspire them to think they can do more.
Some characters might start to question their own actions. For example, if they read a fanfiction that presents a different moral view of their decisions in Endgame, it could make them rethink what they did. Hulk might read a fanfiction where his decision to merge with Banner is presented in a negative light, and it could make him wonder if he made the right choice.
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 characters might become more open - minded. If they are used to the traditional Cinderella story, seeing the different interpretations in the fanfiction could make them realize that there are many ways to tell a story. For instance, a character who always thought Cinderella was just a damsel in distress might see her as a strong, independent figure in the fanfiction.
Ichigo might gain new perspectives on his own power. If the fanfiction shows him in situations where he has to overcome even greater challenges, he could start to think about his own limits differently and maybe strive to be even stronger.
Some might become more self - aware. If the fanfiction highlights certain aspects of their personalities or actions in a new light, they could start to reflect on themselves. For instance, if a character is always seen as a sidekick in the show but in the fanfiction is the hero, it could make them re - evaluate their role.
Some might gain new perspectives on themselves. For instance, if a character is usually seen as a tough - guy, like Zaeed, and the fanfiction shows him in a more vulnerable moment, he might start to question if he really hides his softer side too much.
Conversely, there could be characters who grow apart. Maybe the trailer reveals something that one character supports but another doesn't. This could create a rift between them. For instance, if a new policy or change in the story world shown in the trailer is disagreed upon by two friends.
For characters like Princess Leia, her views might expand. She'd see different interpretations of her relationships, like with Han Solo or Luke Skywalker. Maybe she'd be surprised by some romantic fanfictions that she hadn't considered before.
For Todoroki, if he saw fanfiction that delved into his family issues in a new way, it could make him more self - reflective. He might start to think about his past and his relationship with his father from different angles, which could potentially lead to him having a more nuanced view of himself and his place in his family.
Ruby might start to see more possibilities in her own world. She could realize that there are so many different ways things could be and that they could perhaps be more flexible in their approach to fighting Grimm. For example, if she saw a version of herself in the fanfiction using a completely different weapon or strategy, it might make her think about trying new things.