Well, there's the theme of adventure. They were part of the Marauders after all. Fanfictions often send them on new adventures, whether it's exploring a new part of the wizarding world or solving a mystery. Then there's the theme of sacrifice. They are willing to sacrifice for each other. This can be seen in many stories where one puts himself in danger to save the other. And the theme of love - not necessarily romantic love, but a deep, platonic love that is very strong between them.
A common theme in these fanfictions is the idea of redemption. Sirius, who was wrongly accused, often has his journey of proving his innocence explored. And for Remus, his struggle with his identity as a werewolf and finding acceptance is a big theme. There are also fics that focus on their relationship in the context of the First Wizarding War. How they fought together, the sacrifices they made, and how their friendship endured through the chaos and danger of the war.
One common theme is loyalty. Their loyalty to each other is often explored deeply, as they've been through so much together. For example, in many fics, they stand by each other through difficult times at Hogwarts and later in life.
One common theme is loyalty. Their long - standing friendship forms the basis of their relationship in these fanfictions. Another theme is the struggle with their identities, both as werewolves (in Remus' case) and as outcasts in the wizarding world for different reasons. Their relationship often becomes a source of comfort in the face of such difficulties.
Another theme is the idea of redemption and second chances. Given their complex pasts in the Harry Potter world, fanfictions often play with the concept of them finding new beginnings with each other. For example, Sirius' escape from Azkaban and Remus' struggle with his werewolf nature can be elements that are worked into their relationship development in these stories.
Love and support are very common themes. Since the situation is quite unique, showing how Sirius and Remus support each other through the pregnancy is often a central part. Another theme is acceptance, as they have to accept this new reality in their relationship.
One common theme is loyalty. Given their long - standing friendship, loyalty is a big part of their relationship in fanfiction. They are always there for each other through thick and thin, whether it's dealing with the wizarding world's threats or personal demons.
Common themes might include the exploration of their complex relationship. Since they are friends in the original story, fanfiction could delve into how that friendship turns into something more intimate. Also, themes of trust and loyalty are likely to be present.
Love, both platonic and sometimes romantic, is also a major theme. Their relationship had a special connection, and fanfics might show how that connection could develop into something more. It's about the unspoken feelings they might have had for each other.
I really liked 'Lupin and Black: Unspoken Bonds'. In this fanfic, the relationship between Remus and Sirius is explored in a post - Hogwarts setting. It's a story full of mystery and adventure as they work together to solve a dark magic mystery that's plaguing the wizarding world. Their bond is shown to be unbreakable, even in the face of great danger.
A great Sirius Black and Remus Lupin fanfiction often has well - developed characters. It stays true to the original personalities of Sirius and Remus from the Harry Potter series. For example, Sirius's rebellious and loyal nature and Remus's more reserved and intelligent side should be accurately portrayed.