Some fanfictions focus on young Bruce Banner's relationships. Maybe his friendships at school or with his early mentors. These types of stories give us a different perspective on his character development outside of the Hulk aspect.
One popular young Bruce Banner fanfiction might be those that explore his early days in science. For example, stories where he is just starting his research on gamma radiation. These can be really interesting as they show his initial passion and curiosity.
There are fanfictions that explore Bruce Banner's relationships, like his friendship with other Avengers. For example, a story could focus on how he and Tony Stark collaborate on a scientific project while also dealing with their differences, which is really engaging as it combines both their characters' traits well.
One possible story could be about how Bruce Banner's scientific mind deals with the physical and emotional changes during the pregnancy. Maybe he tries to use his knowledge to understand the unique biological processes at work.
Some Marvel fan communities on social media platforms might also recommend or even host their own young Bruce Banner fanfiction. You can join groups on Facebook or Reddit related to Marvel fanfiction and ask for recommendations.
There's also a Bruce Banner crossover with the 'Star Trek' universe. In this fanfiction, the technology of the Star Trek world is used to try and find a cure for Bruce's Hulk condition. The story delves into the moral and ethical implications of using such advanced technology on a human, and also shows how the different cultures in the Star Trek universe react to the Hulk.
One great 'Bruce Banner and Betty Ross fanfic' could be about their adventures during Bruce's early days of dealing with the Hulk. It might show Betty trying to understand and support him. Another could be a story set in an alternate universe where they manage to live a normal life without the threat of the Hulk always looming.
In other fanfictions, Bruce Banner could be in a situation where he's relaxing and a lemon - scented thing (like a lemonade or a lemon - scented candle) has an unexpected effect on him. It could trigger a memory or a new line of scientific thought that he then pursues, all while dealing with his own internal struggles as Bruce Banner and the potential for the Hulk to emerge.
One great Bruce Banner father fanfic could be 'A Father's Redemption'. In this fanfic, Bruce tries to use his scientific knowledge to protect his family from his own Hulk alter - ego. Another is 'Banner's Fatherly Love' which focuses on how he teaches his child to accept differences. And 'The Father Bruce Banner Always Wanted to Be' shows his journey in becoming a better father figure through various challenges.
The theme of 'Growth Through Friendship' would also be great. Their friendship could be the catalyst for their personal growth. Maybe Tony becomes more empathetic towards others because of his relationship with Bruce, and Bruce becomes more confident in social situations because of Tony's influence.
One idea could be that your OC is a therapist hired by the Avengers to help Bruce Banner deal with his psychological issues related to the Hulk. This would involve deep emotional conversations between the two characters and a new perspective on Banner's struggle.
Another plot twist might be that Thor loses his powers and Bruce, in an unexpected turn, uses his scientific knowledge to transfer some of the Hulk's power to Thor. But this comes with a price, as Thor now has to battle with some of the Hulk's uncontrollable rage. This forces them to work even closer together to find a solution.