In the 'Harry Potter' universe, if Bella was Snape's daughter, it would create a whole new set of sub - plots. The other characters' reactions to this revelation would be diverse. Some might be suspicious of Bella, while others might try to protect her. Snape's own story arc would be altered, as his focus would shift more towards his daughter. In the 'Twilight' universe, Bella's wizarding heritage would disrupt the existing balance. Her love triangle with Edward and Jacob would be affected, as she now has a different identity and a whole new world to consider. There could be new alliances and enemies for her, depending on how the fanfic is written.
The impact on the 'Harry Potter' universe would be significant. Snape's relationship with Dumbledore might be affected as he now has a daughter to protect. His role in the war could change as he tries to keep Bella safe from Voldemort. In the 'Twilight' universe, Bella's new identity could lead to new conflicts. For example, the Volturi might view her as a threat because of her wizarding heritage. And her friends in Forks would be in for a big surprise when they learn about her true nature. It would also introduce a whole new set of magical elements into the 'Twilight' world.
At first, it might be a bit rocky. Harry would be confused about this new place and Bella, and Bella would be a bit overwhelmed by the sudden presence of a magical child. But as time goes on, they would start to bond. Bella would see Harry's vulnerability and his need for love and protection, and Harry would see Bella as a source of stability in this strange new world.
One way it could work is through a complex backstory. Maybe Snape had a relationship before he became so deeply involved in the wizarding war. He could have met Bella's mother, and for some reason, Bella was raised away from him. In the fanfic, Snape could discover her true identity later. This would add a whole new layer of drama, as Snape is a very complex character with his own loyalties and secrets. And Bella, being a Muggle - born in the original story, this would change her entire backstory and connection to the wizarding world.
Edward might be extremely protective. He already has a strong urge to keep Bella safe, but with the added connection to the Joker, he'd be on high alert. He might be worried about the Joker's influence on Bella and try to keep her away from that part of her life.
For one thing, Hermione's status in the wizarding world would be very different. She would no longer be just a muggle - born witch, but a Malfoy. This would change how others view her. The Death Eaters might have a different attitude towards her, and she might be in the middle of the fight between the good side and her father's side. Also, her academic achievements might be seen in a new light, perhaps as a way to prove herself worthy to both her newfound family and her old friends.
The impact would be huge. For one, the entire wizarding world's view of Hermione would change. She has been a symbol of intelligence and a key part of the fight against Voldemort. If she is his daughter, it would make the wizarding community question everything they knew. Dumbledore's plans might also be thrown into chaos. He had always counted on Hermione as an ally, and now he would have to reevaluate her role. The power dynamics at Hogwarts and in the wizarding world at large would be completely different, with Hermione being both a potential threat and a possible asset depending on which side she chooses to embrace.
Bella could possess the power of mind control, which was one of Voldemort's skills. In the Twilight world, this could be used in a different way. Instead of using it for pure evil like Voldemort, she might use it to protect her loved ones. For example, she could influence the minds of vampires or werewolves to stop them from fighting. Additionally, she could have a strong resistance to the Cruciatus Curse, which is a very powerful dark magic spell in the Harry Potter universe.
She would likely become more confident. Knowing she is the daughter of Hades, a powerful god, would give her a sense of self - worth that she might not have had before. For example, instead of being the damsel in distress in her relationship with Edward, she could be an equal partner, using her powers to protect him and his family if needed.
Harry would likely be cautious at first. He's used to dealing with his own set of magical beings, and Bella is something new. Bella, on the other hand, would be curious and a bit overwhelmed by the wizarding world. They might start by simply asking each other questions. Harry would want to know about Bella's world, like how vampires function there, and Bella would be eager to learn about magic spells. As they get to know each other better, they could become friends and rely on each other's strengths in difficult situations.
If they were twins in fanfiction, they'd likely have a very unique bond. Harry is used to being the 'chosen one' in his world, but with Bella as his twin, she might also share some of that destiny. They could have a connection that allows them to sense each other's danger. For example, when Harry is in trouble at Hogwarts, Bella might feel a strange unease all the way in Forks. And when Bella is facing the Volturi, Harry could have some sort of premonition. Their powers could also combine in unexpected ways. Maybe Harry's ability to use spells could be enhanced by Bella's strong willpower.
A fanfiction like this would be full of drama and conflict. First of all, Bella's appearance might change to something more otherworldly. Her eyes could turn a demonic red or something similar. Her relationship with her human father would be strained as she tries to hide her true nature from him. She would probably be hunted by various supernatural beings who either want to use her for her power or destroy her because of her connection to Lucifer. The Cullens would have to decide whether to accept her as she is or try to change her. And Bella herself would be on a journey of self - discovery, trying to figure out who she really is and what she wants to do with her new - found identity.