Perhaps Nero will meet Leonardo da Vinci. Da Vinci's creativity and inventions could fascinate Nero, and they might even collaborate on some projects in the past.
He could meet historical figures like Julius Caesar. Nero might have a conversation with him and learn about ancient Roman politics.
In this fanfiction, Nero might change historical events. For example, he could prevent certain disasters or alter the fates of key characters. Maybe he'll meet his ancestors and learn secrets about his family's past.
Sometimes, there could be historical characters as main characters too. For instance, if Nero travels back to the Roman Empire, Caesar or Cleopatra could be important characters. They would interact with Nero, and their different personalities and goals would create interesting storylines. Nero might have to work with them or against them depending on the plot.
One interesting concept could be Nero's interactions with different historical figures. For example, how he might react when meeting a great philosopher or a powerful leader from the past. It could add a lot of depth to his character.
She could meet her younger self. This would be an interesting encounter as she could offer advice and guidance to her younger version. Maybe she could help her younger self to be less afraid of her powers.
He could meet his past self. It would be really interesting to see how he interacts with his younger, more naive self. He might try to give advice to his past self, like how to better control his power or avoid certain dangerous situations.
She could also encounter characters who were once enemies but are now in a different situation due to the time travel. For instance, she might come across a young Death Eater who hasn't fully committed to the dark side yet. Ginny could try to change their path and prevent them from becoming evil in the future.
He could meet his past allies in a different context. For instance, he might encounter Kakyoin or Polnareff when they were just starting their journey. Maybe he could also run into Dio at a time when Dio was still plotting his rise to power, which would create a very tense situation.
Lucy may also come across ancient warriors. For example, she could meet a Spartan soldier and be amazed by his combat skills and strict discipline. They could have a brief encounter where the Spartan is curious about this strange girl from another time.
There's a possibility that Zuko would meet his grandfather. His grandfather's actions and decisions might have influenced the path the Fire Nation took towards war. By meeting him, Zuko could try to sway his grandfather's views and change the future of the Fire Nation at its root.
Qrow might meet the founders of the Huntsman academies. He could learn from them the original intentions and philosophies behind the creation of Huntsmen. He could also offer his own insights based on his experiences in the future. This interaction could lead to significant changes in the way the academies are run and the training of Huntsmen in the past, which would then have a ripple effect on the future.