In some fanfictions, a character like Ned Stark might discover the plot against Elia Martell in time and use his influence to protect her. This would create a very different story as Ned is known for his honor. It could lead to a situation where he has to make difficult choices between loyalty to the crown and doing what is right. And this would also impact the relationship between the North and Dorne in ways not seen in the original series.
You can try some popular fanfiction websites like Archive of Our Own (AO3). There are often a lot of different takes on saving Elia Martell in the Game of Thrones universe. Just use the search function on the site and type in relevant keywords like 'Elia Martell' and'saved' to narrow down the results.
One great fanfiction could be 'The Lost Queen of Dorne'. It delves into Elia's life before the tragic events in the series. It shows her as a strong and intelligent woman, full of grace and dignity. This fanfic gives more depth to her character, exploring her relationships with her family and her hopes for the future of Dorne.
The mystery surrounding Elia makes fanfiction about her fascinating. Since she was such an important character whose life was cut short brutally in the series, fans want to explore what could have been. It allows us to see different sides of her character that the show might not have had time to develop.
One possible plotline could be an alternate universe where their paths cross in a different political landscape. Maybe they form an alliance for the sake of their respective kingdoms and over time, their relationship deepens into something more personal.
One interesting Arianne Martell fanfiction could be about her journey to claim the Iron Throne on her own terms. Maybe she forms unexpected alliances with other minor houses in Westeros.
One interesting fanfiction could be one where Elia Martell's story somehow intertwines with the wizarding world of Harry Potter. Maybe her magical abilities are explored in a way that fits into the Potterverse. For example, a fanfic could show her as a powerful witch from a different magical culture that Harry and his friends discover during their adventures.
Family loyalty is another big theme. Elia was part of House Martell, and fanfictions often explore her relationship with her family members. Some stories show how her family would go to great lengths to protect her or avenge her death.
A great Arianne Martell OC fanfiction idea is one where an OC is a mysterious assassin sent to Dorne. Instead of fulfilling their mission, they are swayed by Arianne's charm and her cause. They then use their skills to protect Arianne from her enemies within and outside of Dorne, and together they rewrite the fate of Dorne in the Game of Thrones.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can simply search for 'Elia Martell OC' in the search bar. Another place could be FanFiction.net. Although it has a more mixed quality of content, you might still find some interesting Elia Martell OC fanfictions there.
One great Elia Martell OC fanfiction could be 'The Lost Daughter of Dorne'. It weaves a tale of an OC who is related to Elia Martell and her journey through the political intrigues of Westeros. Another is 'Elia's Heir', which focuses on an OC claiming to be Elia's heir and their attempts to restore the Martell name's honor. There's also 'In the Shadow of Elia Martell', a story that follows an OC who lives in the shadow of Elia's memory and how they deal with the expectations and prejudices that come with it.