In a time - travel Bellatrix fanfic, she might go back to the time when she was first introduced to the Dark Arts. This could show a different side of her, perhaps a more innocent - looking but still dark - inclined Bellatrix. She could interact with younger versions of other Death Eaters and form different alliances that change the course of the future in the wizarding world.
A fanfic on this topic could involve Bellatrix traveling through time to the era of the Founders of Hogwarts. She might try to steal powerful magical artifacts from that time to give Voldemort an edge in the present. This would put her in conflict with the magical defenses and wizards of that era, creating an exciting and dangerous adventure for her.
One possible fanfiction could involve Bellatrix going back in time to try and change the outcome of the Battle of Hogwarts in her favor. Maybe she uses time - turners or some dark magic to travel back. She could attempt to kill Harry Potter as a baby before he even becomes a threat.
She could go back in time to meet Tom Riddle when he was still a student at Hogwarts. This would be an interesting encounter as she could try to influence him in different ways compared to what actually happened in the original story.
One interesting 'Harry - Bellatrix time travel' fanfic could be 'Time's Twisted Path'. In this fic, Harry accidentally travels back in time and encounters Bellatrix in her Hogwarts days. It's a fascinating read as it shows a different side of Bellatrix before she turned dark. The author does a great job of exploring the dynamic between the two characters in this alternate timeline.
Bellatrix Black, in a fit of desperation to change the outcome of the Battle of Hogwarts for the Death Eaters, stumbled upon a time - travel spell. She traveled back to the time when Harry Potter first arrived at Hogwarts. She planned to kill him right away, but she was thwarted by Dumbledore, who seemed to sense something amiss. Dumbledore, with his great power, managed to trap Bellatrix in a time - loop for a while until she finally managed to break free. But by then, she had missed her chance to harm Harry and had to return to her own time, realizing that time itself was a powerful force that couldn't be easily manipulated.
She could travel back to the time when Voldemort was still in hiding as a young Tom Riddle. Bellatrix might try to influence him in a different way, perhaps making him even more ruthless. This would change the course of the wizarding world in a very different direction.
In a time travel scenario, their relationship could become a complex love - hate relationship. Bellatrix may find herself attracted to Harry's courage and determination in a different way than she's used to. Harry, while disgusted by Bellatrix's actions in the original timeline, may start to see a different side of her when they are in a different time period. This would be a very strange and morally ambiguous relationship, full of internal and external conflicts.
There are many Hermione time travel fanfics. In some, she travels back to her first year at Hogwarts. She could use her knowledge from the future to outwit Voldemort's plans even earlier. Maybe she'd share some of the secrets she learned later with Harry and Ron right away, making their fight against the Dark Arts more efficient.
One great fanfic could be where Hermione discovers a time - turning spell she didn't know before. She decides to take Harry with her to go back in time to the first year at Hogwarts. They plan to change some small things, like making sure Neville doesn't lose his Remembrall so easily. This could lead to Neville being more confident earlier in the story and potentially changing the whole dynamic of how the students face Voldemort in the later years.
A fanfic could revolve around the idea that the sand phoenix is a key element in a time - traveling prophecy related to Harry Potter. Harry discovers an ancient text that mentions the sand phoenix and its connection to time. He embarks on a journey through time to find the sand phoenix, facing many challenges along the way, such as dark wizards who also want to control the power of the sand phoenix for their own evil purposes.
Perhaps Harry Potter travels back in time and ends up befriending a younger Bellatrix. He could try to influence her to not become a Death Eater. This would create a really complex situation because he has to balance not changing too much of the future while also trying to save her from the dark path. It could lead to some really intense moments where Harry has to hide his true identity and motives from her.