In a more complex scenario, Bellatrix could be trying to use a dark magic ritual that would cause great harm to the wizarding world. Harry discovers her plan and has to engage her in a magical struggle. In the process, he manages to turn her own dark magic against her, which results in her death. This would show Harry's ingenuity and his ability to use the enemy's own weapons against them.
Well, it could be a major turning point. It might change the power dynamics in the wizarding world significantly. For example, Voldemort would lose one of his most loyal and powerful followers. This could lead to a shift in the way he operates and make him more desperate or erratic. It also might affect the morale of the Death Eaters, some could lose faith in Voldemort's cause without Bellatrix's unwavering support and leadership among them.
Perhaps in the fanfiction, Harry Potter's death occurs because he tries to rewrite a powerful magic spell that goes horribly wrong. He was always known for his bravery and willingness to take risks in the original series, so this could be an extension of that. His death would then be a tragic consequence of his own curiosity and desire to push the boundaries of magic.
One possible scenario could be that Harry is exiled due to false accusations of dark magic. Maybe the Ministry of Magic, fearing his power after the defeat of Voldemort, spreads lies about him being a threat. Another could be that he chooses exile to protect his friends from a new, unknown danger that is targeting him specifically.
In some fanfictions, Harry might use a flask to store potions. For example, he could carry a flask of Felix Felicis, the luck potion, with him during a dangerous mission at Hogwarts. This would give him an edge in tricky situations.
One possible scenario is when he meets an ancient and powerful magical being that has just emerged after a long slumber. Dumbledore, in his wisdom, bows to show respect for this being's age - old magic and power. Another could be in a situation where he is facing a group of powerful wizards from a different culture with their own traditions, and he bows as a sign of diplomatic respect.
One scenario could be that a powerful magic spell backfires and turns Bellatrix into a small animal that Harry then takes in as a pet. Another could be that in an alternate universe created in the fanfiction, the power dynamics are so different that Bellatrix is somehow subjugated to Harry and made into his pet.
A possible plotline is that Bellatrix is actually an undercover agent for the Order of the Phoenix all along, and her relationship with Harry is part of her cover. They get married as part of a larger plan to infiltrate the Death Eaters more deeply. As they live together, they start to truly care for each other. Another plotline could be that a powerful magical artifact forces them to marry. They initially hate each other but as they are forced to co - exist, they discover hidden sides of each other. Harry might see the broken and conflicted person inside Bellatrix, and Bellatrix might see the true hero in Harry. This could lead to a very complex and emotional story of love and redemption.
Another possibility is that Bellatrix is being controlled by an even more powerful and mysterious force. This force wants Harry Potter to be saved for its own purposes. Bellatrix is just a tool in this situation. The fanfiction could explore how she struggles against this control while still fulfilling the task of saving Harry.
Well, there could be themes like the power of love to overcome differences. Harry is a symbol of good and Bellatrix of evil, so a fanfiction might explore how love can bridge this huge gap. Also, themes of self - discovery for Harry, as loving someone like Bellatrix would make him question his own values and beliefs. This kind of fanfiction would likely have complex character development to make such an unusual relationship seem plausible.
One scenario could be when he's in the Forbidden Forest. He's been out there for a while, perhaps on a secret mission, and he hasn't had a chance to eat. His stomach growls, and it might even attract the attention of some of the forest's creatures. It would create a tense moment as he has to deal with both the threat of being discovered and his hunger.