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 great Bellatrix Lestrange x Male OC fanfiction is 'The Dark Bond'. It explores a unique relationship where the Male OC has a complex past that intersects with Bellatrix's loyalty to Voldemort. The story is full of tension and mystery.
The plot could involve the son trying to redeem his mother's name. He might go on a journey to find out more about her past, hoping to understand why she became so evil. Along the way, he meets various characters who knew his mother and has to deal with their mixed reactions towards him.
The allure of Bellatrix Lestrange x Male OC fanfiction lies in the contrast. Bellatrix is this dark, fanatical Death Eater, and when paired with a male original character, it can create a really interesting dynamic. It allows for exploration of the dark side of the wizarding world from a different perspective.
Voldemort is often paired with Bellatrix in fanfiction. Their relationship in the original series was one of master and servant, but in fanfiction, it can be explored in more complex and romantic ways. Another character often paired with her is Narcissa. Their sisterly bond can be a central focus, or it can be twisted into something more sinister or complex in fan - created stories. Also, sometimes Sirius Black is paired with her in alternate universe stories, given their family connection and the contrast in their loyalties.
Perhaps a plotline where Harry discovers the truth about his parentage later in life. He has been raised believing Bellatrix is his mother, but then uncovers evidence that it's all a complex web of dark magic and deception. This could lead to a journey of self - discovery as he tries to figure out who he really is and where he belongs in the wizarding world, all while dealing with the stigma of being associated with Bellatrix Lestrange.
There's a fanfic where Bellatrix Lestrange's son is sent away as a baby to protect him from the chaos of the wizarding war. He grows up in a different magical community, unaware of his true heritage at first. As he gets older, he starts to have strange dreams and visions that lead him back to the wizarding world he was born into, and he has to face the truth about his mother.
Voldemort would be a likely character to interact with Harry. Since Bellatrix was one of Voldemort's most loyal followers, he might take an interest in Harry as her son. He could either see Harry as a potential powerful ally or a threat depending on how his powers develop. Another character could be Draco Malfoy. Given the connection between the Malfoy family and the Death Eaters, Draco might have a complex relationship with Harry, perhaps initially seeing him as an equal in the dark magic world but later having doubts as Harry shows signs of not fully embracing the dark side.
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.