Another interesting change could be Sirius introducing a new magical element or concept into the story. He might bring in a long - forgotten spell or a magical artifact that has the power to either help or harm the characters. This would not only change the plot but also force the other characters to adapt to this new aspect of their world.
Harry Potter would likely be one of the main characters affected. Sirius was his godfather, so any changes Sirius makes could have a huge impact on Harry's life, his understanding of his family, and his role in the wizarding world.
One common change is that he becomes moodier. The loss of Sirius is a huge blow, and he may swing between being extremely sad and angry. Another change could be that he is less likely to take risks without thinking. Sirius' death makes him more cautious as he realizes the consequences of recklessness.
He becomes more withdrawn. Harry was always a bit guarded, but now he's even more so. He doesn't open up as easily to new people or even his old friends sometimes. He's also more determined. The loss of Sirius makes him more resolute in his fight against Voldemort, as if he has a personal vendetta now more than ever.
Well, for one, Draco's sense of identity would be completely shaken. Growing up believing he was a Malfoy with all the associated values and then finding out he was Sirius' son would be a huge shock. He would have to re - evaluate his beliefs about blood purity and family loyalty. His relationship with his mother and father (the Malfoys) would be strained. He might start to exhibit a more carefree and humorous side, like Sirius. His appearance might even change a bit in how he presents himself, perhaps dressing less formally like a traditional Malfoy and more like Sirius in a more laid - back style.
Ron and Hermione become even more protective of Harry. They are constantly by his side, trying to cheer him up. Their relationship with Harry deepens as they share his pain. In some fanfictions, this brings Ron and Hermione closer together romantically as well, as they bond over their shared concern for Harry.
In some Pokemon League Changes Fanfiction, the location of the league battles could be different. They might not be held in the traditional arenas but in more natural or unique settings. This could affect how trainers prepare their Pokemon for battles. The rewards for winning in the league could also change. Instead of just trophies and titles, trainers could receive rare Pokemon eggs or exclusive training items that can boost their Pokemon's growth significantly.
The plot would take a darker turn. Instead of being the voice of reason and using her intelligence for good, Hermione as a dark witch might use her knowledge to create chaos or gain power. The school environment, like Hogwarts, would no longer be a safe place. Teachers would be on guard, and students might be in danger from her actions or experiments with dark magic.
One common theme is forbidden love. Since Sirius often has a complex relationship with the wizarding society's norms, his love stories in fanfiction often involve loving someone he's not supposed to. Another theme is redemption through love. His past mistakes or his family's dark legacy are sometimes redeemed by the power of love in these stories.