A plot idea could be that the arranged marriage is a condition for Sirius to be fully pardoned for his past crimes. The Ministry believes that Hermione's influence will keep Sirius in line. So, they have to make this marriage work. Along the way, they face opposition from some pure - blood families who don't think Hermione, a Muggle - born, is suitable for a Black.
A possible plotline is that Hermione uses her intelligence to help Sirius clear his name in the wizarding world while dealing with their arranged marriage. This could involve her researching old laws and magical artifacts. Or, Sirius could teach Hermione some of the more unorthodox magic he knows, which helps her in her studies and also strengthens their bond. Also, there could be a sub - plot where they have to pretend to be a happily married couple for a mission, and during this pretense, they actually start to fall for each other.
One plot idea could be Hermione and Severus initially hating the idea of the arranged marriage. Hermione might try to find a way out while Severus is conflicted between his past prejudices and the new situation. As they are forced to spend time together, they gradually discover each other's hidden depths. For example, Hermione realizes Severus's great knowledge of the Dark Arts which he can use to protect her in a dangerous situation, and Severus comes to respect Hermione's intelligence and courage.
It could be interesting in terms of the power dynamics within the wizarding world. An arranged marriage between them might be part of a larger political or family scheme. Maybe there are those who want to use Hermione's intelligence and Sirius' connection to the Black family for some ulterior motive. This would create a lot of tension and mystery as they try to figure out who is behind it all and what the end game is.
A possible plot is that Hermione discovers some long - lost secrets about her father, Sirius. This could lead her on a quest to uncover the truth about his past and his family. Along the way, she might find out about some hidden magical artifacts or spells that were associated with Sirius's family line. It could also involve her interacting with Sirius's old friends and enemies, which would create a lot of interesting dynamics. For instance, she might have to deal with some who are still bitter about Sirius or others who want to protect his legacy through her.
One plot idea could be Hermione discovering her true parentage through a series of magical events. Maybe she stumbles upon an old family heirloom that has a connection to Sirius. Another could be her having to deal with the reactions of her friends, like Harry and Ron, who are shocked by this revelation. She might also face challenges within the wizarding community as Sirius had a somewhat controversial past.
One idea could be that the daughter inherits Hermione's intelligence and Sirius's rebellious spirit. She might use her smarts to uncover secrets about the wizarding world that were long buried, like hidden spells or lost histories. Another plot could involve her struggling to fit in at Hogwarts, being the daughter of two such well - known figures. She could face both envy and admiration from her peers.
Another plot could be set in an alternate universe where Sirius never went to Azkaban. He and Hermione meet when she is a young, brilliant witch just starting at Hogwarts. Sirius, being a bit of a rebel, takes Hermione under his wing and they embark on adventures outside of the school rules, exploring the Forbidden Forest together and uncovering secrets about the wizarding world that are not taught in classes.
Sirius is impulsive and rebellious. Hermione, on the other hand, is studious and rule - abiding. Their personalities could clash as Sirius might want to break the rules of the arranged marriage, while Hermione would be more likely to try and make the best of it. But they could also complement each other. Sirius could teach Hermione to be more spontaneous, and Hermione could help Sirius be more responsible.
One plot idea could be that Temari is arranged to marry someone from a minor clan in Konoha. This causes a stir as she is from Suna and has a high status. She initially struggles with the idea of being married into a less - prominent family, but then discovers that the family has some unique and secret techniques that could benefit Suna. Another idea is that the arranged marriage is part of a prophecy. Temari and her future partner must work together to fulfill the prophecy, which involves saving both Konoha and Suna from a great danger.
A plot could revolve around the cultural clash between Percy, a demigod used to a more modern and sometimes chaotic world, and Artemis, a goddess with her own very strict and ancient ways. The arranged marriage forces them to navigate this. Maybe Percy tries to introduce Artemis to things like modern music or movies, which she initially scoffs at but later starts to enjoy. In the process of trying to make the best of the situation, they could also face challenges from other mythological creatures who see their union as a threat to the existing order of the mythological world.