There might be a fanfiction where sephiroth time travels to meet his younger self. He tries to guide his younger self away from the dark path that he once took, which could lead to a whole new set of adventures and character developments.
One interesting sephiroth time travel fanfiction could be where he travels back to prevent a great disaster in his world. He uses his knowledge of future events and his powers to change the course of history.
One interesting Naruto Sephiroth fanfiction could be about Sephiroth somehow ending up in the Naruto universe and having to adapt to the ninja world. Maybe he teams up with Naruto to fight a common enemy. Another could involve Naruto learning some of Sephiroth's combat techniques and incorporating them into his own style.
His character can also develop through his interactions with characters from different time periods. Meeting people with different values and beliefs can make him question his own, and this self - reflection can lead to significant changes in his personality. For instance, if he meets a group of peaceful people in the past, he might start to consider a different way of life. He could become more complex, not just the one - dimensional villain we often see in the original story.
There might be a fanfiction where Sephiroth and Lightning are from different dimensions and accidentally end up in the same world. They have to figure out how to get back while also dealing with the new environment and each other's personalities. This could lead to a lot of character development and interesting interactions.
One interesting aspect could be the unique crossovers in such fanfiction. For example, imagining how the magical world of Harry Potter would interact with the complex character of Sephiroth. Maybe a story where Sephiroth somehow ends up at Hogwarts and his powers disrupt the normal magical order there. Another could be about a friendship or rivalry formed between Harry Potter and Sephiroth within the fan - created universe, with the two having to deal with each other's vastly different backgrounds and abilities.
A fanfiction concept could also be a story set in an alternate universe where Aerith and Sephiroth are on the same side from the start. They could be part of a team, working together against a common enemy. This would completely change their dynamic and give writers a chance to explore their characters in a new light.
One interesting WW2 time travel fanfiction could be about a modern-day historian who travels back to WW2. They might use their knowledge of the war to change small events and see how it affects the overall outcome. For example, they could prevent a key intelligence leak that would have otherwise given the enemy an advantage.
A great sasunaru time travel fanfiction could involve both of them traveling to a different time period, perhaps during the era of the Sage of Six Paths. There, they learn about their past reincarnations and the origin of their connection. This gives them a deeper understanding of their bond and also allows them to gain new powers or knowledge that they bring back to their own time.
One interesting Buffy time travel fanfiction could be where Buffy travels back to the day she was called as a slayer and tries to change some small events that she thinks might have a big impact on her future battles. For example, she might try to give herself some extra slayer training tips early on.
One interesting RWBY time travel fanfiction could be where a character goes back in time to prevent a major disaster that happened in the original timeline. For example, Ruby might travel back to stop the fall of Beacon earlier than it originally occurred. This would change the course of events and lead to different character developments and interactions.
There might be a fanfiction where Daenerys travels forward in time. She finds a Westeros that has advanced technologically but lost its connection to magic. Daenerys then has to figure out how to navigate this new world while still holding onto her own identity and values. She could be both in awe and dismayed by what she sees, and her dragons would be a huge shock to the modern world.