Identity is also a common theme. Harry Potter has her identity as a wizard, a Gryffindor, and someone who has defeated Voldemort. Bruce Banner has his identity as a scientist and the Hulk. In these fanfictions, they may struggle with their identities, especially when they are in a new world or situation together. They might question who they are and how their identities change when they are with each other.
One common theme is the relationship between Bruce Banner and a fellow Avenger. For example, a love story with Natasha Romanoff, exploring how their different personalities interact in a romantic context.
One common theme is the discovery of self - worth. The OC often helps Bruce see his own value beyond his Hulk side. For example, in many stories, the OC encourages Bruce to pursue his scientific interests without fear.
One common theme is acceptance. Since Bruce has his Hulk side, a lot of fanfictions focus on the reader accepting all of him, both the brilliant scientist and the powerful Hulk. For example, stories might show the reader helping Bruce come to terms with his dual nature.
The theme of sacrifice also shows up. Since they are both heroes in the Marvel world, fanfics may explore situations where one has to sacrifice for the other. This could be related to saving the other from a dangerous enemy or making a difficult choice to protect their relationship. Additionally, the theme of redemption can be present, especially for characters like Bruce who often struggle with his inner demons.
One common theme is his struggle with the Hulk. Writers often explore how he copes with this dual identity, like in stories where he tries to find a permanent cure. Another theme is his relationships, especially his friendship with the other Avengers. For example, how Tony Stark might help him with his scientific research related to the Hulk.
Another theme is redemption. Natasha might see helping Bruce control the Hulk as a way to redeem herself for her past actions. And Bruce might see Natasha as a chance at a normal life, which is a form of redemption for him. It's a complex interplay that is explored in a lot of the fanfictions.
In fanfiction, Bruce Banner could save Harry Potter through his scientific knowledge as well as the Hulk's powers. Maybe there's a situation where a magical curse is spreading uncontrollably. Bruce, in his normal state, could analyze the curse using his scientific expertise and figure out a way to stop it. And if there are any physical manifestations of the curse that need to be dealt with, the Hulk could step in and use his strength to destroy or contain them. This would show a great combination of the scientific and magical elements in the story.
I really liked a fanfic where fem Harry Potter accidentally travels to Bruce Banner's world. It shows how she tries to adapt to this new world full of science and technology, which is so different from the magical world she's used to. And Bruce Banner is intrigued by her magic. It's a great exploration of two very different characters coming together.
In this kind of fanfiction scenario, Harry Potter might be saved in a very unique way. Bruce Banner, when he transforms into the Hulk, has incredible strength. He could use his brute force to protect Harry from dark wizards or dangerous magical creatures. For example, if Voldemort was about to cast a deadly spell on Harry, the Hulk could jump in and take the hit or simply overpower Voldemort. It would be a really interesting crossover as it combines the magical world of Harry Potter with the superhero world of Bruce Banner.
If they meet, Bruce Banner might be really intrigued by the magic in Harry's world. He could see it as a new form of science. And Harry could be fascinated by Bruce's scientific knowledge. They might exchange ideas, with Harry showing Bruce how magic can do things like teleportation, and Bruce explaining some scientific concepts to Harry, like how gamma radiation works.