The theme of self - discovery is very common. The OC is on a journey to find out his true self. Love and friendship also play a role. He may find people who see him for who he is, not just as Bellatrix's son. And then there's the theme of secrecy. He might have to keep his identity a secret for various reasons, like fear of being judged or hunted.
A big theme is the battle between nature and nurture. Just because he's Bellatrix's son, does he have an inborn inclination towards dark magic? Fanfics often explore this. Family legacy is also a major theme. He has to deal with the reputation of his family. And there's the theme of acceptance. How does the wizarding world accept or reject this OC who has such a dark - associated lineage?
One great 'OC Son of Bellatrix Lestrange' fanfiction is 'The Heir of Chaos'. It explores the life of the OC as he struggles with his mother's dark legacy. The author does a wonderful job of creating a believable world within the wizarding universe. The character development is really engaging, as the OC tries to find his own path, different from the pure evil associated with Bellatrix.
One common theme is the struggle between nature and nurture. Since Bellatrix is a dark character, the fanfiction often explores whether the baby will follow in her dark footsteps or break free due to other influences. Another theme is secrecy. The existence of Bellatrix's baby is often a well - guarded secret in these stories.
One common theme is loyalty. Since they are both Death Eaters, their loyalty to Voldemort and to each other is often explored. For example, in many fanfictions, they will go to great lengths to protect each other in the name of their shared cause.
Power dynamics is a very common theme. Bellatrix is a powerful witch, and the relationship with the reader often involves issues of power and control. Also, forbidden love is a theme that frequently shows up. Given Bellatrix's status as a Death Eater, a relationship with her would be considered taboo in the wizarding world. There's also the theme of self - discovery for the reader as they interact with such a complex character.
One common theme is loyalty. Bellatrix's unwavering loyalty to Voldemort is often a starting point which gets developed into a love - like relationship. Another is the idea of power. Their shared thirst for power can be portrayed as a bond that ties them together in a romantic way. Also, the darkness within them is a theme, as they both are immersed in the dark arts and that common ground can be seen as a basis for their relationship in fanfiction.
One common theme is her relationship with the Dark Lord. Writers often explore how she became so devoted to Voldemort at a young age. Another theme is her time at Hogwarts. It could be about her studies, her friendships or rivalries there. And her family influence is also a big theme. How did growing up in the Black family shape her into the person she became later?
The theme of redemption can also be present. Some fanfictions might explore if there is any chance for Bellatrix to turn away from the Dark Side, or how Sirius's actions might have an impact on her in some way. This can create a complex and interesting character dynamic, especially considering Bellatrix's deep - seated loyalty to Voldemort.
Another theme is redemption. Many fanfics explore the idea of the daughter trying to atone for her mother's sins or break free from the cycle of evil that her mother was a part of. For example, she might try to use her magic for good instead of following in Bellatrix's footsteps.
One common theme is the exploration of redemption. Some fanfictions might show Bellatrix having a moment of realization and trying to atone for her actions, and Harry being involved in that process. Another theme could be the power struggle. Given that Harry has his own power as the Chosen One and Bellatrix is a powerful Death Eater, their relationship can be framed in terms of who has more power or how they use their power around each other.
One common theme is the exploration of good vs. evil within their relationship. Since Sirius is on the side of good and Bellatrix on the side of evil. Another theme could be the idea of forbidden love, as their different loyalties would make a relationship between them extremely difficult in the context of the 'Harry Potter' world.