One possible plotline could be that Tatia's sister is a long - lost relative who suddenly shows up in Mystic Falls. She might have some hidden powers or knowledge about the vampire - werewolf - witch triangle that the main characters are unaware of, and this knowledge could either help or hinder them in their battles.
She might be a powerful witch, more powerful than Bonnie. In the fanfiction, she could come to Mystic Falls to avenge Tatia's death. Along the way, she gets involved with the Salvatore brothers and Elena. Her magic could cause all sorts of chaos in the town as she tries to take on the vampires who she blames for her sister's death. She could also form an unlikely alliance with some of the characters, like Caroline, and together they try to bring a new balance to the supernatural world of Mystic Falls.
Well, often Tumblr is also a great place to look for such fanfiction. There are many Vampire Diaries fan communities on Tumblr. Some users might share links or even write their own fanfiction about Tatia's sister. You can search relevant tags like #VampireDiaries #TatiaSisterFanfiction. However, the content on Tumblr can be a bit unorganized, so it might take some time to sift through.
One interesting 'The Vampire Diaries Tatia' fanfiction could be the ones that explore her relationship with the original vampire brothers before the events of the show. For example, a fanfiction might delve into how Tatia's love was a catalyst for the brothers' rivalry in a more detailed and alternative way compared to the show.
Another possible plotline is that Valerie and Stefan discover a hidden prophecy that links their fates together. They then have to work together to fulfill the prophecy or prevent it from coming true. Along the way, they face numerous obstacles and their relationship is put to the test. Their journey could take them to different magical realms or involve battles with powerful supernatural beings.
A common plotline is the sister's adjustment to the new world she's come back to. Things might have changed a lot since she died, like new vampire lords or different witch covens in control.
One plotline could be centered around the idea that the kiss unlocks a hidden power within Caroline. Since Klaus is such a powerful original vampire, his connection with Caroline through the kiss might awaken something dormant in her. This could then lead to a journey of self - discovery for Caroline as she tries to understand and control this new power, all while dealing with her complex relationship with Klaus.
Another plotline could revolve around Elena's return. But she comes back different, maybe with a new power or a different personality due to some supernatural event that occurred while she was away. Her return would disrupt the lives of Damon, Stefan, and their friends, as they have to deal with this new version of Elena.
Fanfiction.net is a great place to start. It has a large collection of 'The Vampire Diaries' fanfictions, and you can easily search for Tatia - related ones. Just use the search bar and type in 'Tatia' along with 'The Vampire Diaries' and you'll get a list of relevant fanfictions.
A common plotline is the Salvatore sister coming back to life after being thought dead for a long time. This brings a lot of drama as her brothers have to adjust to having her around again. Also, she might be a hybrid, part vampire and part something else. This gives her unique abilities and makes her a target for different factions in the story. Many fanfictions explore how she deals with her new identity and the powers that come with it.
Well, one common plotline is the exploration of different relationships that were not fully developed in the show. For example, some fanfictions focus on a deeper bond between Caroline and Bonnie. Another is the 'what if' scenarios, like what if Elena had chosen Damon right from the start? There are also fanfictions that introduce new supernatural elements to Mystic Falls, making the town even more dangerous and exciting.
Perhaps there's a plotline where the main character in 'Oblivion' has to deal with a forgotten prophecy that ties into the Vampire Diaries' lore. This could involve them trying to figure out what it means and how it affects their relationships with other characters like the Salvatore brothers.