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.
He would probably be more conflicted. On one hand, he would have the potential for great good, like the original Harry. But on the other hand, he would have the shadow of Bellatrix's dark deeds hanging over him. This internal conflict could make him more withdrawn at times. He might also have a fascination with the dark arts, not in an evil way, but more out of a need to understand his mother's world. This would set him apart from the Harry we know, who was always more firmly on the side of light magic.
One big challenge would be trust. Bellatrix has been a loyal Death Eater and has tried to kill Harry many times. Even in pet form, Harry would have a hard time believing she wouldn't turn on him if she regained her normal form. Another challenge would be how others in the wizarding world would react. The Order of the Phoenix might not trust Harry's decision to keep her around, even as a pet.
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.
It could be stronger in certain dark arts. Given his parentage, he might have a natural affinity for curses and hexes that are associated with the dark side. He could learn and perform these spells with greater ease compared to other wizards. However, he might struggle with defensive and positive magic, like healing spells or protective charms.
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.
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.
The story would become much darker. Bellatrix is a symbol of pure evil in the Potter universe.
In a fanfic, their relationship could be more intimate on an emotional level. In the books, Voldemort mainly uses Bellatrix for her loyalty and her skills as a Death Eater. But in a fanfic, there could be moments where he actually confides in her about his fears or his long - term plans. Bellatrix, in turn, could be more of an advisor rather than just a follower.
She might be motivated by a long - lost connection. For instance, if there was a family tie between Harry and her that she was previously unaware of. Or perhaps she has a change of heart after seeing the true nature of Voldemort's actions and decides that Harry is the only hope to stop the chaos and destruction Voldemort is causing. It could also be that she is magically bound to save Harry due to some ancient spell or prophecy that she discovers.
Definitely. In the original plot, Bellatrix is a loyal follower of Voldemort and would never be expected to save Harry. But in a fanfic, the author can rewrite the rules. It might be that the fanfic delves deeper into Bellatrix's character, showing that she is not just a one - dimensional villain. There could be a moment of redemption for her, where she realizes that Harry represents something more important than her loyalty to Voldemort, and this realization drives her to save him.