Family bonds are also quite common. It could show how the family dynamic changes with Luke's rising fame and how his baby sister fits into that. Maybe she looks up to him and he tries to be a good role model for her. There could be heartwarming moments of them spending time together despite his busy schedule.
A common theme is romance. Since Luke is quite popular, many fanfics revolve around a love story between him and the main character. Another theme is his music career. Fanfics often incorporate his shows, songwriting, and the whole music - making process. Friendship is also a theme. Sometimes the story focuses on his friendships within the band or with other people.
Sure. You can check out Archive of Our Own (AO3). There are often a variety of fanfictions related to this topic. Just search for 'luke hemmings baby sister' and you'll likely find some interesting reads.
One common theme is romance. Writers often create stories where the main character has a romantic relationship with Luke Hemmings. It could be a sweet, innocent love story or a more passionate and intense one.
One common theme is loyalty. Since it's about best friends, loyalty often plays a big role in the stories. For example, a story might show how Luke's best friend stands by him during tough times in his music career.
One common theme is protection. Since they were in danger as babies, many fanfictions focus on how they were kept safe.
Protection is a common theme. Since he's a baby and the son of Anakin Skywalker, many fanfictions focus on how various characters like Obi - Wan, Beru, and Owen protect him from the Empire. For example, Obi - Wan might use his Jedi skills to hide Luke's presence.
Family is a very common theme. Since she's part of the Winchester family, stories often revolve around her relationship with her brothers and how they protect each other.
The characterization is crucial. A good fanfic will capture Luke's personality accurately, like his charm, his sense of humor, and his passion for music. It might also show his relationships with other people in a believable way. For instance, how he interacts with his bandmates or his family. And the writing style should be engaging, drawing the reader in from the very beginning and keeping their attention throughout the story.
Identity is also a big theme. His sister may struggle to define herself outside of being 'Reid's sister'. She might try to pursue her own interests and dreams that are different from what the family expects based on Reid's achievements.
A lot of the fanfiction focuses on the power struggle. Jeff has his own dark power, and sometimes his sister also has some sort of power, and there is a struggle between them in terms of who is more powerful and how that power is used. Also, the theme of protection is there. The sister may try to protect others from Jeff or protect Jeff from himself.