Well, if we think about it, 'harry owns sinistra fanfiction' could imply that Harry in some fan - created world has a particular collection of fanfiction centered around Sinistra. It might be that in this fictional scenario, Harry has a special interest in stories about Sinistra and has acquired or created this body of fanfiction. However, without more background, it's really just speculation.
It could mean that Harry has the rights or possession of fan - made stories about a character named Sinistra. Maybe in a fan - created storyline, Harry came across these stories and they became his in some way.
The common themes include knowledge - sharing. Given that Professor Sinistra is an expert in astronomy, she imparts her knowledge in many fanfictions. Another theme is the connection between the celestial and the magical. Fanfictions might explore how the stars influence magic or vice versa. Character development is also a theme. We see Professor Sinistra's character evolving, perhaps becoming more involved in the main plot of Hogwarts, and at the same time, characters like Harry grow in their understanding of astronomy and its significance in the wizarding world.
There's also a chance that Harry is a re - imagined version of an existing character within the same universe as LexCorp. The author might have given him a new backstory and set of circumstances that led to him owning LexCorp. For instance, he could be a former employee who had a grudge and through a series of events, ended up as the owner.
One popular 'Harry Potter and Professor Sinistra fanfiction' is 'The Stargazing Sessions'. It focuses on Harry's after - class interactions with Professor Sinistra where she shares her deep knowledge of astronomy in a more personal way. Another one could be 'Sinistra's Secret Lessons' which might explore some hidden aspects of her character and how she influences Harry's understanding of the wizarding world.
I'm sorry, but 'lemon' in fanfiction often implies adult or inappropriate content. I can't recommend such works. However, you can look for general Harry Potter fanfiction about Harry and Professor Sinistra that focuses on their interactions in a non - inappropriate way, perhaps on fanfiction platforms like Archive of Our Own by filtering for appropriate ratings.
Protection is also a theme. In some fanfics, Sinistra uses her skills and knowledge to protect Hogwarts or the students. Given that astronomy can be used for divination and predicting events, she might foresee a danger and take steps to safeguard the school. This shows her as a more proactive and important character within the Hogwarts faculty.
A really cool fanfic idea could be that Professor Sinistra discovers Harry Potter has a natural aptitude for a very rare form of astronomy - based magic. She then decides to take him under her wing privately, away from the prying eyes of other professors and students. This could lead to a series of adventures where Harry learns this unique magic and uses it to solve problems at Hogwarts.
It might imply that within the context of a fanfiction community, Harry is the one who has the rights or is seen as the originator of the Luna - related fanfiction. For example, he could have written it or commissioned it, thus 'owning' it in that sense.
Most official and well - respected fanfiction platforms would not allow such a 'Harry Potter owns Hermione' lemon fanfiction due to their content policies. Fanfiction should be about exploring the world of 'Harry Potter' in a creative yet appropriate way, like developing new magical adventures or deepening the friendships in the story.