Big Nate's rebellious side can be a key aspect to develop. Maybe he decides to break a school rule for a good reason, like to save a hurt animal on school grounds. Gina, on the other hand, is initially against it because she's a rule - follower. But as she sees Nate's compassion, she starts to question her own strict adherence to rules. This would develop both of their personalities as they learn from each other. Also, Nate's love for drawing can be used to create a connection between them. He could draw Gina as a superhero, which makes her see his creative and sweet side.
To develop Big Nate's personality, you could have him face a personal challenge, like dealing with the loss of a pet. Gina could be there to comfort him, and through this, Nate could show his vulnerability. His loyalty to his friends could also be shown when someone tries to bully one of his buddies at school. Gina's personality can be further developed by showing her social side. She could invite Nate to a party she's hosting for their classmates, and there, we can see her being a good host and making everyone feel welcome, which is different from her usual studious image.
For Big Nate, his competitiveness could be explored more. In the fanfiction, he could enter a skateboarding competition, and Gina could be there to support him. This would show his determination and also how he reacts to pressure. His sense of humor could also be highlighted, like when he makes jokes to ease the tension during a difficult situation. As for Gina, her studious nature could be developed by having her tutor Big Nate in a subject he's struggling with. This would also show her patience and kindness.
For David, his overly positive and sometimes naive personality could be developed by having him face some real disappointments. For example, if a camper he really liked left the camp suddenly. This would force him to grow and become more realistic. Gwen, on the other hand, who is often more cynical, could start to open up more when she sees David's unwavering optimism in difficult situations and learn to be more positive herself.
For Nico, his past traumas and his connection to the underworld could be explored more deeply. He could be shown to gradually open up more about his feelings, especially to Jason. For example, he might share his experiences with loss and how it has shaped him. Jason, on the other hand, his sense of duty and leadership could be developed by putting him in situations where he has to make tough decisions. He could also show more vulnerability, like when he doubts his own abilities in the face of a very powerful enemy. This would make their characters more three - dimensional.
For Aoba, you could explore his more vulnerable side. In the original, he's often shown as a bit of a troublemaker. But in fanfiction, we could see how he reacts when he's truly in over his head. As for Mikado, we can develop his leadership skills more. Maybe he has to take charge in a situation where Aoba is too impulsive, and this forces him to grow.
For Kyoko, she could be shown as more vulnerable in the fanfiction. Maybe she has a fear of heights and Yui helps her overcome it, which shows her growth. Yui, on the other hand, could be developed by showing her more impatient side when things don't go as planned during an event at school, and Kyoko is the one to calm her down.
Elizabeth's confidence may grow even more as she becomes the mistress of Pemberley. She could start taking on more social responsibilities and use her intelligence to make positive changes in the community. Darcy, on the other hand, might become more open and less reserved as he is influenced by Elizabeth's warm and sociable nature. He may start to show his emotions more freely and be more involved in the daily lives of those around him.
Hermione's already - strong - willed personality could become even more resolute as she takes on the role of Harry's wife. She might be more assertive in protecting Harry and their relationship. Harry, on the other hand, could grow in his confidence, especially with Hermione by his side constantly supporting him. Their marriage could also make them more empathetic towards each other's past traumas.
For Kira, you can show his growth from a reluctant hero to a confident leader within the marriage. Maybe he becomes more assertive in his beliefs. For Lacus, her kind - hearted nature can be explored more deeply as she uses it to support Kira and their new family. She could also become more politically savvy.
In a fanfiction, Loki's personality could be developed through his relationship with Darcy. His arrogance could be tempered as he realizes Darcy doesn't fall for his usual tricks. He might start to be more honest and sincere. Darcy, on the other hand, could become more confident in her abilities. Her encounters with Loki, a powerful being from another realm, could make her realize she has more to offer than just being a sidekick. She could start to take charge in situations and use her intelligence in a more assertive way. This would change the dynamic between them and make their relationship more complex and interesting.
Sam could start to take on more responsibility in the relationship and in their future family. Maybe she decides to go back to school or get a better job. Freddie, on the other hand, could become more confident in his role as a husband and father - to - be. He might start to stand up for himself more against Sam's sometimes overbearing ways, but in a loving manner.
Ren could show his more protective side as a father. His usual charm and confidence in his acting career could translate into being a strong and reliable father figure. For example, he would be very protective of the baby when it comes to media attention, making sure the baby's privacy is respected.