One common theme is the struggle between good and evil. Ginny represents good and Tom Riddle represents evil, and their relationship often explores how these two forces interact. Another theme is redemption. Some fanfictions show Ginny trying to redeem Tom from his dark ways. And there's also the theme of forbidden love, as their relationship is not something that would be considered normal in the wizarding world.
The main characters are obviously Tom Riddle and Ginny Lemon. Tom Riddle is often portrayed as a complex and dark character. He is highly intelligent but also extremely power - hungry. Ginny Lemon, on the other hand, is usually depicted as a brave and somewhat headstrong character. She may be written as a character who is not easily intimidated by Tom's dark presence.
One common theme is the struggle between good and evil. Ginny, being on the side of good, is often in conflict with Tom Riddle, who represents evil. This creates a lot of internal and external drama as Ginny tries to resist his dark influence or understand the part of him that she might be attracted to.
In some fanfictions, Ginny might start as a naive girl but as she gets involved with Tom Riddle, she becomes more aware of the darker aspects of magic. She could develop a stronger will to resist his manipulations.
She may develop a more complex understanding of the nature of good and evil. Meeting Tom Riddle in a different time context, she would see him not just as the evil Voldemort but as a young, troubled wizard. This could make her question her own beliefs about people being inherently good or bad. She might also learn more about the history of magic and how it has been misused, which would add to her overall wisdom and character depth.
Another plot could involve a time - travel aspect. Ginny Lemon could somehow be sent back in time to when Tom Riddle was a student at Hogwarts. She might try to change his path towards the dark side by showing him kindness and understanding, but things could go awry as Tom's ambition and insecurities still drive him towards the dark arts, and Ginny has to deal with the consequences of her actions.
One great Ginny Weasley and Tom Riddle time travel fanfiction is 'A Twist in Time'. In this story, Ginny accidentally travels back in time and encounters a young Tom Riddle. It's really interesting to see how she tries to navigate the situation without revealing too much about the future. Another good one is 'Time's Anomaly' where the time travel is caused by a magical experiment gone wrong, and Ginny has to figure out how to stop Tom Riddle from becoming Voldemort in this altered timeline.
One possible plot could be that Tom Riddle, using his charm and manipulation skills, lures Ginny into a secluded place under false pretenses and then takes her captive. He might be after some information that he believes Ginny has, perhaps related to the secrets of Hogwarts or the Weasley family. Ginny, being a brave character, would constantly try to resist and find a way to escape while Tom Riddle would be using his dark magic to keep her in check.
At the start, Ginny would be shocked and terrified when Tom Riddle kidnaps her. However, as time passes, her Gryffindor courage would kick in. She would start to analyze Tom Riddle's motives and actions. She might pretend to be more vulnerable than she actually is to lower his guard. Ginny could also try to communicate with any magical creatures or objects in her vicinity for help. And she would be mentally preparing herself for a fight or escape, using every bit of her magical training and her wits to outsmart Tom Riddle.
One possible theme could be the allure of the dark side. Ginny was once under the influence of Tom Riddle through his diary. So, in fanfiction, it could explore how that initial allure still lingers and affects their interactions. Another theme might be redemption. Maybe the story could be about Tom Riddle finding a way to redeem himself through his connection with Ginny. And of course, there could be themes of love and attraction, though not in a sexual way as we're avoiding inappropriate content.