Friendship - turned - love is a very common theme. Many fanfictions start with their strong friendship as Marauders and then develop it into a more romantic relationship. Also, the theme of sacrifice is there. They are willing to sacrifice for each other, whether it's facing dark wizards or dealing with the consequences of their relationship being discovered in the Hogwarts environment.
One common theme is loyalty. In these fanfictions, their loyalty to each other is often emphasized. It's shown through their actions, like Sirius standing by James no matter what, and vice versa. Another theme is the exploration of a forbidden love. Since their relationship in a romantic sense goes against the typical friendships in the wizarding world, it adds an element of secrecy and danger.
Friendship is a very common theme. Their deep bond as best friends is often explored, like how they were always there for each other, through good times and bad. For example, in many fanfics, they support each other during difficult exams or when facing bullies at Hogwarts.
Friendship is a huge theme. Their bond was so strong in the original story, and fanfictions often explore different aspects of it, like how they first became friends or how they supported each other through tough times.
One common theme is mentorship turned into something more. Sirius often starts as a mentor - like figure to Harry, and then the relationship evolves. Another theme is the exploration of family - like bonds that transform into a deeper connection.
One common theme is loyalty. Sirius Black is known for his loyalty in the original series, and in slash fanfiction, this loyalty often extends to his relationship with the other character. Another theme is the struggle against the prejudices of the wizarding world. Since slash relationships might not be as accepted in that world, they have to fight against that.
One common theme is friendship. They were very close friends in the original story, and fanfics often explore the depth of their friendship, how they support each other through various situations.
Friendship is a very common theme. Their bond is often depicted as something extremely strong and unwavering. They are shown to be there for each other no matter what.
Friendship is a very common theme. The deep bond between Sirius and James is often explored, like how they were always there for each other, through pranks, study sessions, and dealing with the Slytherins. Another theme is loyalty. Their loyalty to each other and to their group, the Marauders, is a central part of many stories.
Friendship is a very common theme. Their bond as best friends is often explored, showing how they supported each other through thick and thin at Hogwarts.
One common theme is friendship. Their bond is often explored in depth, showing how they were like brothers. Another theme is mischief, as they were known for their pranks at Hogwarts. For example, in many fanfics, they play elaborate pranks on Snape.
One common theme is family. Since Sirius comes from the Black family, his sister's relationship with her family and how it impacts her connection with James Potter is often explored. For example, the Black family's pure - blood mania might create conflict or a sense of alienation for her.