If Bellatrix was Harry's mother, his life would be a complete departure from what we know. He'd grow up in a world full of fear and secrecy. Bellatrix's reputation as a Death Eater would mean that Harry would constantly be in danger, not just from Voldemort's side but also from those who oppose the Dark Arts. His education would be different too. Instead of Hogwarts' traditional curriculum, he might be taught more about the dark secrets of the wizarding world. His relationships would also be affected. He might not have the same friendships as he does in the original story, as his mother's actions and beliefs would isolate him from many in the wizarding community.
In a 'bellatrix is harry's mother' fanfiction, the plot could be quite wild. For example, Bellatrix could have been forced to give up Harry at birth due to her position as a Death Eater. Years later, Harry discovers the truth through some magical means. This could lead to a series of events where Harry tries to understand his mother's true nature. Bellatrix might also have a change of heart and try to protect Harry from Voldemort, which would create a lot of tension and drama as she has to balance her two loyalties. It would be a complete departure from the normal 'Harry Potter' narrative and would offer a very different perspective on the characters.
Harry's personality would be a far cry from what we know. He'd be more likely to be power - hungry and less concerned with the well - being of others. Bellatrix's influence would make him see the wizarding world in terms of pure - blood superiority and the use of force. He may not have the same sense of humor or the ability to make friends easily, as his values would be so different.
In fanfiction, it might be possible if the author creates a whole new backstory. Say, Bellatrix was forced to give up her child (Harry) for some reason related to the power struggle in the wizarding world. Or perhaps there was a mix - up at the time of Harry's birth, and he was wrongly attributed to Lily and James. But these are all very far - fetched ideas that go against the original story.
Fanfiction allows for all kinds of wild ideas, and the idea of Bellatrix being Harry's biological mother is one of them. It's a very strange concept when you think about the established facts in the 'Harry Potter' universe. Bellatrix was a devoted follower of Voldemort and was involved in many dark deeds. Lily, on the other hand, was a loving mother who sacrificed herself for Harry. But in fanfiction, an author could rewrite the backstory in such a way that Bellatrix had some sort of connection to Harry's birth. Maybe through some dark magic or a convoluted plot twist, but it goes against the grain of the original story.
Harry might be more secretive. He'd have to hide any doubts or conflicting feelings he has about the dark path he's being led down. Bellatrix would not tolerate any signs of weakness or deviation from her plans. So, he'd become very good at hiding his true self, which would make his personality complex and full of contradictions.
He could develop a more cunning side. Bellatrix is a sly character, and Harry would need to learn to be crafty to survive in her world. This would be a big change from his usually straightforward and brave self. For example, he might learn how to deceive Death Eaters or other threats.
Bellatrix's character would have to be rewritten to some extent. Saving Harry would go against everything she has stood for in the original story. So, she might become more conflicted, showing both her old, evil self and a new, emerging self that is capable of good. Her relationships with other Death Eaters would also be affected, as they would view her actions as betrayal. This would add a whole new layer of drama and complexity to her character in the fanfic.
His life would change drastically. He'd be surrounded by Death Eaters and the dark side of magic. His values would be challenged, and he might not have the same friends. He could become more feared in the wizarding world.
Yes, it's possible. Fanfiction writers often come up with very unorthodox ideas to create new stories. In the context of Harry being Bellatrix's son in a fanfic, it would completely change the dynamics of the story. Harry's character development, his relationships with other characters like Dumbledore and Voldemort, would all be radically different. It would be an interesting, if not controversial, exploration of the Harry Potter world.
His personality would be a blend of Snape's cynicism and his own inherent goodness. He might be more introverted, spending more time in study and self - reflection. Harry would also have a deeper understanding of the darker side of magic and the wizarding world, which could make him seem a bit more brooding. He'd still be brave, but his bravery would be more of a quiet determination rather than the brash kind we see in the original books.