Often, there's the theme of emotional turmoil. Harry having a crush on Sirius can bring a lot of confusion for him. He might struggle with how to act around Sirius, how to deal with his own jealousy if Sirius pays attention to others. Also, loyalty is a theme. Harry's loyalty to Sirius might be intensified by his crush, and he has to balance that with his other relationships in the story.
The theme of secrecy is quite common. Harry would likely keep his crush a secret, especially considering the nature of their relationship and the wizarding society's expectations. And there's also the theme of growth. Through his feelings for Sirius, Harry can grow as a character, learning more about love, relationships, and his own place in the world of magic.
One common theme could be the struggle with forbidden feelings. Since Harry and Lucius are on opposite sides in the original story, having Harry develop a crush goes against the natural order of things. Another theme might be self - discovery, as Harry has to come to terms with this unexpected attraction and what it means for his identity.
One common theme is the exploration of unrequited love. Since in the original series, Hermione is more into Ron, Harry's crush often goes unnoticed or unreciprocated, creating a lot of angst.
In these fanfictions, a common theme is the fear of rejection. Harry is often afraid to confess his crush to Charlie. And there's the theme of growth. His feelings for Charlie can lead to personal growth, like becoming more confident or more understanding of his emotions. The theme of secrecy also shows up a lot, as Harry may keep his crush a secret from others for various reasons.
Yes, there are quite a few. You can start by looking on popular fanfiction websites like Archive of Our Own. Some fanfics in this theme might explore the complex emotions Harry could have for Sirius in a really interesting way, delving into their relationship and how such a crush might develop within the context of the Harry Potter universe.
Another theme is family. Since Harry lacks a proper family, Sirius becomes like family to him. Fanfictions explore how they create a family - like bond in the absence of Harry's real family. It can be really emotional.
One common theme is loyalty. Sirius is extremely loyal to Harry, and vice versa. In many fanfictions, this loyalty is what gets them through tough situations, like when Harry is facing danger from Voldemort.
Adventure is also a big theme. Just like Harry had his own adventures at Hogwarts, fanfictions often have James Sirius getting into various escapades and Harry either being involved directly or guiding him from the sidelines. It gives a sense of passing on the torch of bravery.
Well, the themes often include redemption. Sirius has a complex past and in many fanfictions, he gets a chance to fully redeem himself. Also, the theme of mentorship is common. Sirius guiding Harry through the difficulties of the wizarding world. And there's the theme of friendship. Their bond that goes beyond the normal wizard - wizard relationship. In these fanfictions, they often rely on each other in tough situations which shows the depth of their friendship.
One common theme is the idea of second chances. With Harry deaged, Sirius gets a chance to be a better guardian or mentor, sort of like a redo of their relationship. For example, in many stories, Sirius is able to prevent some of the traumas Harry faced in the original story.
One common theme is family bonds. Since they are brothers in these fictions, it explores a deeper, more protective family relationship. Another theme is loyalty. Sirius is already known for his loyalty to Harry in the original story, but as brothers, it's intensified. Also, there's often a theme of self - discovery as Harry learns more about his family and himself through this new relationship.