One plotline could be that Sirius is trying to make Remus Lupin jealous by flirting with Hermione. He might not have real feelings at first but then actually starts to develop them as he gets to know her better.
In a fanfiction, there could be a plot where Hermione starts tutoring younger students in advanced magic. Sirius witnesses her teaching skills and her passion for knowledge. He begins to see her not just as a young witch, but as a very attractive and intelligent woman. Another idea is that they are both on a secret mission for the Order of the Phoenix. Hermione's ability to stay calm under pressure and her strategic thinking during the mission makes Sirius feel a strong attraction towards her.
You can try fanfiction websites like FanFiction.net or Archive of Our Own (AO3). Just search for 'Hermione flirts with Sirius Black' in their search bars, and you should be able to find relevant fanfictions.
One possible plotline could be that Hermione starts flirting with Remus as a way to learn more about the wizarding world's history from his perspective. Since he's older and has experienced a lot, her flirting is a means to an end at first, but then it develops into something more.
One possible plotline could be Sirius revealing the truth to Hermione early on. This would make Hermione question her identity and her place in the wizarding world. She might then start to explore her Black family heritage more, which could lead to her getting involved in things related to the family's dark past.
Well, perhaps in the fanfiction, Sirius would take Hermione on adventures around the wizarding world. Since he was part of the Marauders, he'd know all kinds of hidden places. They could visit ancient magical sites, and along the way, Sirius would share stories about her parents if he knew them. This would not only give Hermione a broader knowledge of the wizarding world but also a sense of connection to her past. Also, he might train her to be a better dueler, preparing her for any threats that come her way in the future.
I think it's common because both characters have a lot of depth. Hermione is known for her intelligence and determination, while Sirius has his own allure with his wild past and loyalty. Writers are attracted to exploring how their personalities would interact in a flirtatious situation. Also, it adds a bit of a romantic or at least an interesting relationship - building aspect to the stories that many fans enjoy reading.
One plotline could be the secrecy around the baby. Since Sirius was on the run for a long time, they might have to keep the baby's existence a secret from the Ministry. Hermione would use her intelligence to create protective spells and hiding places. Another could be the baby showing extraordinary magical abilities early on, which attracts unwanted attention from dark forces.
One common plotline is Sirius being protective of Hermione. He might see her intelligence and bravery and feel drawn to her. He could protect her from various threats in the wizarding world, like Death Eaters or other dark forces.
One possible interpretation could be a very dark and out - of - character exploration. Sirius is a complex character, and this could be seen as a way to show a corrupted or extremely passionate side of him that is not in line with his more heroic portrayals in the original series. For Hermione, it would be a very different kind of relationship dynamic than what she is used to in the books. However, this is a rather extreme and often inappropriate interpretation.
Yes, there might be some fanfiction out there with such a concept. Fanfiction often explores unique and sometimes unexpected relationships. However, it's important to note that this kind of pairing may deviate from the original source material's intended relationships.