To develop Dom Styles, describe his daily routines, his hobbies, and what makes him tick. For Peter, you could write about his insecurities at first and then how he overcomes them with the help of Dom Styles. Use dialogue to show their personalities. For example, Dom Styles could be more direct and Peter more hesitant in their conversations.
One idea could be a story where Dom Styles has to protect Sub Peter from some kind of danger in a fantasy world. They could go on a quest together and their relationship could develop during the challenges they face.
For Snape, his usually cold and strict personality could be enhanced in his dominant role. He might be more demanding and less patient. Harry, as the sub, could develop a more submissive side to his usually brave and headstrong personality. He would learn to listen more and be less impulsive.
For Naruto, his dominant side can be developed by emphasizing his natural leadership qualities. He's always been determined and has a strong will. In this concept, he can use those traits to be more in control. For example, he can be more assertive in his interactions with Sakura. Sakura, as the submissive one, can show her growth by being more open to Naruto's guidance. She can learn to trust his decisions more fully, which is a change from her more independent self in the original series.
For Harry, you can explore his more mature side. Since he has experienced so much in the original series, in the fanfiction, he can be shown as more confident and less impulsive. He could also be more empathetic towards Severus, given Severus' difficult past. For Severus, his dry sense of humor and his deep - seated loyalty (even if it's hidden) can be further explored. Maybe show how his relationship with Harry changes his view of the world and makes him a bit more open.
To develop Harry's character further, give him some internal conflicts. For example, he might struggle with his submissive role at times, but his loyalty to Imhotep always wins. Show his growth as he becomes more confident in his relationship with Imhotep. For Imhotep, show his softer side gradually. Maybe he starts to care more about Harry's feelings as they spend more time together, which is a contrast to his initially cold and dominant self.
The lab rats can be developed by giving each of them distinct personalities. For example, one rat could be brave and always the first to explore new areas, while another could be more cautious and act as the voice of reason. You can also show their growth over time, like how they become more confident or more strategic as the story progresses.
In the fanfiction, Scorpion could start to question his motives of revenge. Sub - Zero's presence and different perspective could make him think about whether his never - ending quest for vengeance is really worth it. Sub - Zero, on the other hand, might learn about the pain that Scorpion has endured which made him so vengeful, and this could change his view of Scorpion from just an enemy to someone with a legitimate cause. This mutual understanding can lead to a great character development arc for both of them.
The relationship can start with conflict. For instance, if Harry is in a position of power over Draco, Draco might resist at first. Then, through shared experiences like facing a common enemy or solving a mystery together, they can start to understand each other better. Harry could show kindness to Draco, which Draco may not be used to, and this can gradually break down the barriers between them.
Another way is if there was a magical accident that forces Harry and Snape to rely on each other. For example, they are trapped in a magical realm where only by combining their unique magical abilities can they escape. During this time, they have to put aside their differences and work together. Harry learns about Snape's past traumas and Snape sees Harry's courage and determination up close, which changes their relationship for the better.
For Agent Alice, her character can be developed by showing her vulnerability. Maybe she has a fear of heights, but on a mission with Peter, she has to overcome it. For Peter, he could be developed by having him face a moral dilemma. For example, when they are on a mission, he has to decide between following the rules or saving an innocent person.