One common theme is redemption. Sirius often goes back in time to right the wrongs he feels he's committed or to prevent tragedies from happening. For example, he might try to save someone who died in the original timeline.
Another theme is self - discovery. When he goes back in time, he sees his past self and gains a new perspective on who he is. He might realize things about his personality or his relationships that he didn't before. It's like he's looking at himself from the outside in. Also, the theme of changing the future is quite prevalent. He wants to make the future better for his friends and the wizarding world in general by altering the past.
One common theme is redemption. Sirius has been through a lot, and in Christmas - themed fanfictions, he might find a chance to redeem himself in the eyes of the wizarding world or his friends. Another theme could be family. Christmas is a time for family, and Sirius, who has lost his family in a way, may find a new family among his friends like Harry and the others at Hogwarts. Also, the theme of hope often appears. With the magic of Christmas, there's hope for a better future for Sirius, away from his past troubles.
There are several common themes. The power of forgiveness is one. Given their differences, fanfictions might show how Sirius could forgive Draco for his past actions or how Draco could forgive Sirius for any preconceived notions. Another theme is the exploration of the wizarding society from their different perspectives. Draco, as a Slytherin, and Sirius, as a Gryffindor, have different views on the social hierarchy and magical traditions, and fanfictions often explore these differences.
The theme of redemption also appears sometimes. Sirius might have made mistakes in the past, and the arranged marriage becomes a way for him to start anew. He has to learn to be responsible in the relationship, and through that, he redeems himself. This can add an interesting layer to the story as it shows his growth as a character.
One common theme is family. Sirius is Harry's godfather, so many fanfictions explore the idea of family that goes beyond blood. Another theme is redemption. Sirius has a past full of mistakes and he often tries to redeem himself through his relationship with Harry. Also, protection is a big theme. Sirius is always trying to protect Harry from the threats in the wizarding world.
The theme of mentorship also comes up frequently. Sirius Black, with his wealth of knowledge and experience, is often depicted as a mentor figure to Lily Luna Potter. This can involve teaching her about magic, helping her deal with the challenges of being a Potter in the wizarding world, or guiding her through moral and ethical dilemmas.
A prevalent theme is her struggle for identity. Being related to a well - known figure like Sirius Black, she has to find her own place in the wizarding world. This includes dealing with the prejudices some might have because of her family connection, as well as carving out her own unique path in life and magic.
Another theme could be Sirius helping Harry deal with the difficulties at Hogwarts. This might include protecting Harry from bullies like Draco Malfoy or guiding him through the challenges of certain classes. In some fanfictions, Sirius might use his experience as a Gryffindor to inspire Harry and give him confidence.
One common theme is redemption. For example, in many fanfictions, Sirius gets a chance to go back and right some of the wrongs he may have felt he committed in his past. Another theme is self - discovery. As he travels through time, he learns more about himself and his place in the wizarding world.
One common theme is time - travel. Since there's a 'Time Queen' involved, the stories often play with the idea of Sirius Black traveling through time, either to change the past or to understand the future. Another theme is the power struggle. The Time Queen usually has some sort of powerful abilities related to time, and Sirius might be caught up in a struggle for power or against those who misuse the time - related powers.
One common theme is family loyalty vs. personal beliefs. Since Sirius is in Gryffindor and his sister in Slytherin, they often have different outlooks. The sister may struggle between her loyalty to her family's Slytherin values and her own emerging beliefs. For example, in some fanfictions, she might question the pure - blood supremacy her family holds dear.