Perhaps the self - insert is a time - traveler who accidentally ends up in Tom Riddle's era. They know his future as Voldemort and try to subtly change the course of events. They might start by joining his study group, and as they get closer, they introduce positive influences like Muggle - friendly magic ideas. This causes a rift between Tom and his budding dark followers as he starts to question his own beliefs.
The self - insert could change Tom Riddle's fate by showing him true friendship. In the original story, Tom Riddle was a lonely boy who turned to dark magic. If the self - insert befriends him and is always there for him, it might make him less likely to seek power through dark means.
One idea could be a time - travel fanfic where Harry goes back in time and tries to prevent Tom Riddle from becoming Voldemort. He could try to befriend the young Tom and show him a different path. Another could be a fanfic where Harry and Tom are somehow trapped in an alternate dimension together and have to work together to escape, all while Harry tries to understand what made Tom turn so evil. A third idea is a fanfic where Tom Riddle actually has a change of heart early on due to some magical accident that makes him experience a different kind of love and kindness, and Harry has to deal with this new Tom in Hogwarts.
In a 'Harry Potter meets Tom Riddle' fanfiction, a really unique plot could be that Tom Riddle is reborn as a normal wizard without the dark desires due to some powerful magic. Harry Potter meets this new Tom and they become friends at Hogwarts. However, there are still some remnants of the old Tom's power that attract dark forces. So, Harry and Tom have to work together to fend off these threats while also exploring Tom's new identity and how it affects the future of the wizarding world. This would involve a lot of character development for both Harry and Tom, as they navigate their relationship in this new scenario.
One idea could be a time - travel plot where Harry goes back in time and tries to prevent Tom Riddle from becoming Voldemort. He could try to befriend the young Tom and show him a different path. Another could be a scenario where they are both put in a magically created alternate reality where they have to work together to escape.
One idea could be that in this fanfiction world, because of the physical resemblance, Harry is often mistaken for a descendant of Tom Riddle in a more positive light than in the original series. This could lead to some witches and wizards believing he has the potential for great power without the dark taint. For example, he might be offered special training by some old wizarding families who want to use his supposed connection to Riddle for good. Another plot could involve Harry using this resemblance to infiltrate a group of Death Eaters who are trying to revive Voldemort in a new way. He could pretend to be on their side, learn their secrets, and then expose them.
Another plot idea is that there's a prophecy related to an Alpha - Tom Riddle and an Omega - Harry Potter. Their fates are intertwined in a way that neither of them fully understands at first. As they interact, they start to realize that the balance between them is crucial for the future of the wizarding world. For example, Harry might find that his Omega powers can nullify some of Tom's dark magic, leading to a series of tense encounters.
A possible plot is that a young wizard, who is a huge fan of Harry Potter stories in his own time, somehow gets transported back to Tom Riddle's era. He initially just wants to see the famous Hogwarts of that time. But then he crosses paths with Tom Riddle. He decides to use his knowledge of the future to try and befriend Riddle and change his path. However, he soon realizes that Riddle is far more complex and dangerous than he expected, and his actions start to have unforeseen consequences on the future.
A possible plot is that Harry travels back and accidentally disrupts the timeline. As a result, things start to change in the present he came from. He has to figure out how to fix it while dealing with Tom. Maybe he tries to mentor Tom in a positive way, showing him the value of Muggle - born wizards. This could create a ripple effect where Tom doesn't grow to hate Muggles and non - purebloods. Also, Harry could discover new spells or magic that was lost over time while in Tom's era and bring that knowledge back to his own time if he manages to return.
One plot idea could be that Fem Harry, with her unique perspective as a female in a male - dominated wizarding world, catches Tom Riddle's attention in Hogwarts. He's intrigued by her different way of approaching magic. Maybe she's more empathetic and uses magic in a way that he's never seen before, leading to a complex relationship where he both admires and is jealous of her power.
One idea could be that Harry accidentally travels back in time and meets a young Tom Riddle before he fully turns evil. He tries to change Tom's path by befriending him and showing him kindness, which leads to a series of events where the future of the wizarding world starts to change in unexpected ways.