The relationship would likely change significantly. Bella's sister, as a wolf, would have different loyalties and instincts. She might be more drawn to the Quileute tribe and their ways. Bella, on the other hand, is involved with the Cullens. This could cause some friction as they have different affiliations. However, they would also have a new bond in that they are both part of the supernatural world in Forks, and they could support each other in dealing with the challenges that come with it.
At first, their relationship might become strained. Bella's sister would have to keep her new identity a secret from Bella, which could create distance. But once Bella finds out, they could become closer as Bella tries to understand what her sister is going through. Bella might be more protective of her sister now that she's in a more dangerous world.
Their relationship could change in many ways. Initially, Bella's sister would be scared to tell Bella about her transformation, fearing her reaction. Once revealed, Bella could be in awe of her sister's new powers but also worried. The sister, as a wolf, might have a stronger urge to protect Bella, which could be a role reversal. They would have to navigate their new dynamic, with the sister having to balance her wolf -pack duties and her relationship with Bella. There could be times when their views on certain situations, like dealing with vampires, would differ, but ultimately their sisterly love would still be there and they would find ways to work through their differences.
She might become more assertive. In the Twilight series, Bella is often rather passive, but in the Mikaelson family, she would need to be more forceful to hold her own. She'd have to learn to be more cunning and strategic, like the Mikaelsons are.
Her relationship with Bella would likely become more complex. As a vampire, she would have different needs and instincts. She might be more protective of Bella in a way that Bella doesn't understand at first. For example, she could sense danger towards Bella that a human wouldn't notice. But at the same time, Bella might be a bit afraid of her sister's new vampire nature, which could create some tension between them.
She might become more protective. As Silas's sister, she would have a natural inclination to safeguard him, which could make her more assertive.
If Bella becomes a banshee, her relationship with Edward would be very different. He would be more protective of her as she has a new and potentially dangerous power. He might also be a bit wary as banshees are known for their wailing which could attract unwanted attention. With Jacob, he might see her as even more of an enigma and be more drawn to her in a way, since she's now a more powerful supernatural being.
At first, their relationship might be a bit strained. Draco is used to the pure - blood Slytherin way of life, and Bella, with her different background, could be seen as an oddity in the family. However, as they grow older, they might start to understand each other more. Draco could come to appreciate Bella's unique perspective, and Bella could see the good in Draco beneath his often - prickly exterior.
Well, on one hand, Edward could be proud of Bella having such a powerful connection in the vampire world. But on the other hand, he would be constantly on guard. The Volturi are a powerful and dangerous group. Bella being Aro's twin means she is part of that world in a much more direct way. This could lead to arguments between them as Edward tries to keep her safe while Bella wants to explore her new identity and the powers that might come with it.
She would likely become more confident in her own strangeness. Instead of being the somewhat shy and self - deprecating Bella we know from the Twilight series, she would embrace her darker side. For example, she might not be as hesitant to stand up to those who try to bully or intimidate her.
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.
It depends on the specific fanfiction. Some fanfictions focus more on action or other plot elements rather than fully developing their relationship. However, in the ones that do, it can be a really interesting and complex relationship with a lot of emotional depth.
You can try FanFiction.net. It has a large collection of fan - made stories, and you're likely to find some bella swan sister wolf fanfiction there.