One common theme is redemption. Often, either Azriel or Eris is portrayed as seeking redemption in some way, whether it's for past actions or for their family's reputation. Another theme is rivalry - turned - friendship. Their initial animosity towards each other slowly morphs into a form of respect and friendship in many fanfics.
One great Azriel and Eris fanfic is 'The Unlikely Alliance'. It explores their relationship in a world where they have to work together to face a common enemy. The author does a wonderful job of building their characters and the tension between them.
One common theme is rivalry - turned - friendship or more. Given their complex relationship in the original works, many fanfictions explore how they might overcome their differences. Another theme is redemption. Eris has a somewhat controversial character arc, and fanfictions often delve into his journey of redemption with Azriel being a part of it. And of course, there's the theme of love. Whether it's a slow - burn romance or a sudden realization of feelings.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). There are often tags and search filters that you can use to specifically find Azriel and Eris fanfictions. Another option is to check out Tumblr, where many fans might share links or even write their own short fanfictions. Some Wattpad users also write fanfiction, so it's worth a look there too.
The theme of self - discovery also frequently appears. As their relationship develops, both Elain and Azriel discover new sides of themselves. For example, Elain might find a new strength within her because of Azriel's belief in her, and Azriel might open up more about his past traumas due to Elain's kindness.
One of the common themes is the exploration of their individual powers and how they complement each other. Azriel with his shadows and Elain with her seer abilities. Fanfics might show how they use their powers together or how their powers influence their relationship. Also, redemption is sometimes a theme. Maybe Azriel has some past mistakes he wants to make up for in relation to Elain, or Elain has to redeem herself in Azriel's eyes. And of course, the theme of self - discovery. As they get closer, they learn more about themselves.
Eris was one of the largest dwarf planets known in the solar system. It was about the same size as Pluto, but it was three times as far away from the sun as Pluto. Eris 'revolution period was about 557 Earth years, and its rotation period was 25.9 hours, similar to Earth. Its orbit was highly inclined, at least 44 degrees from the ecliptic of the other planets. Eris had a known satellite called Synomia, which was the second largest known satellite in the dwarf planet system. The discovery of Eris led to a change in the definition of a planet, re-categorizing Pluto as a dwarf planet, and reducing the number of planets in the solar system to eight. The discovery of Eris had a major impact on the organizational structure of the solar system.
The unique world - building in Eris MLP fanfic also stands out. Writers often create new settings or tweak existing ones to fit Eris into the MLP world. They might introduce new magic systems or cultural elements that are influenced by Eris's origin. This not only makes the story more engaging but also expands the overall MLP lore in a creative way.
One common theme is the exploration of chaos. Since Eris is often associated with chaos in the MLP universe, many fanfics explore how she spreads or deals with chaos. For example, she might create some wild magical mayhem in Equestria just for fun.
Adventure is also a prevalent theme. They might embark on quests to find lost magical artifacts or to save the wizarding world from a new threat. This allows for a lot of exciting plot twists and turns.