Rebellion is a big theme. Sirius was a rebel in the wizarding world. Fanfictions often portray his acts of rebellion against the norms of the pure - blood society. Also, friendship is a major theme. His deep friendships with James, Remus, and Peter are central to many stories. They show how they support each other, have fun together, and face challenges as a group. And of course, the theme of justice, as Sirius was wrongly imprisoned and his fight for justice is a recurring element.
One common theme is loyalty. Sirius is extremely loyal to his friends, the Marauders. So many fanfictions explore this loyalty, like how he stands by them through thick and thin. Another theme is family. His difficult relationship with his family, especially his pure - blood supremacist relatives, is often delved into. For example, stories might show his struggle to break free from their expectations.
One common theme is loyalty. Sirius is a very loyal character, and this often plays a big part in his love stories. His loyalty to his friends and his love interest is a key aspect. Another theme is the struggle against the dark times. The Marauders era was filled with danger, and his love story often has to deal with that.
The theme of self - discovery also pops up a lot. In the context of the Marauders era, both Sirius and Severus are still growing and changing. Fanfictions might show how their relationship, whether it be adversarial or something more, helps them to better understand themselves. For example, Sirius may learn about his own capacity for forgiveness through his interactions with Severus, and Severus may discover new aspects of his own strength.
The theme of freedom is quite important too. Sirius was locked up in Azkaban for a long time, and when he escaped, he was fighting for his freedom. Fanfictions often expand on this, showing his journey to fully regain his freedom and his place in the wizarding world, while also dealing with the prejudice against him because of his supposed crimes.
One common theme is friendship and loyalty. The Marauders' unwavering support for Sirius showcases the strength of their bond. Another theme could be healing. Sirius has to go through a process of emotional healing, and the fanfiction might explore how he does that with the help of his friends. Also, there might be a theme of justice, especially if the abuser is still around or if there are people who need to be held accountable for what happened to Sirius.
The theme of redemption also shows up. Since Sirius had a somewhat 'tainted' reputation in the eyes of the Black family, some fanfictions explore if Orion could have played a role in his redemption or if Sirius could have redeemed the family name in Orion's eyes.
A prevalent theme is the exploration of relationships. His relationships with his friends, like Remus and James (in flashbacks or through memories), are re - examined. How they support or sometimes struggle to support him is a big part of these fanfictions. Also, the relationship with the potential father of the child (if it's part of the story) is often a central focus, full of drama, love, and sometimes conflict.
One common theme is family. Since Sirius comes from the Black family, stories often explore how his child is related to the family's complex history, traditions, and dark secrets.
One common theme is redemption. Since Sirius had a troubled past, many fanfictions focus on him trying to make up for his past mistakes as a professor. Another theme is family. He might be a father figure to some students, especially those who lack proper family support at Hogwarts.
One common theme is family heritage. Since the Blacks are an old pure - blood family, many fanfictions explore how Sirius Black's mother dealt with the family's traditions and expectations. Another theme is the mother - son relationship. Given Sirius's rebellious nature, how his mother reacted to it and how it affected their relationship is often explored.
One common theme is self - acceptance. The fanfictions may show Sirius coming to terms with his body image in a world that might have different ideals. For example, he could learn to love himself despite not fitting the typical 'fit and handsome' image often associated with him in the original series.