Well, it depends on the fanfiction community. In some parts of the larger fanfiction world, it might not be that well - known or popular. But among those who are deeply into the lore of the Dark Eldar and the concept of inter - species relationships, it can be quite popular. The idea of a human falling for a Dark Eldar or vice versa can lead to some really complex and engaging stories that can keep readers hooked, especially when it delves into how such a relationship would work given the differences in their races.
One common theme is the clash of cultures. The Dark Eldar have a very different and often brutal culture compared to humans. Writers often explore how this affects the relationship. Survival is also a theme. In a universe where the Dark Eldar are dangerous, a human in a relationship with one has to constantly worry about survival. And then there's the theme of secrecy. Keeping the relationship a secret from both human and Dark Eldar societies can add a lot of drama to the story.
One common theme is the clash of cultures. The Eldar and humans have vastly different ways of life, beliefs, and values. In these fanfictions, this often creates interesting conflicts and misunderstandings that the characters have to overcome for their relationship to progress.
One common theme is cultural exchange. Since humans and eldar have very different cultures, it's often explored how they interact and learn from each other. For example, in many stories, the human might be fascinated by the eldar's advanced technology or spiritual beliefs.
One popular 'Warhammer 40k Eldar Human Romance Fanfiction' is 'The Unlikely Bond'. It tells the story of a human soldier and an Eldar farseer who are forced to work together during a battle and gradually develop feelings for each other.
In the official Warhammer 40k lore, while it is highly unlikely due to the vast differences between the Eldar and Humans. The Eldar are an ancient and often self - centered race, while Humans in the Imperium can be very xenophobic. However, there have been some rare, tenuous alliances in extreme circumstances, such as when facing a greater common threat like the Tyranids. But overall, it goes against the typical nature of both races in the long - standing lore.
There's also 'Journey with the Eldar'. In this fanfiction, a human gets lost in eldar territory and through a series of adventures, they form a bond. It's filled with beautiful descriptions of the eldar's world and how the human adapts to it. It also explores the differences and similarities between the two races in a very engaging way.
They can interact in many ways. Sometimes they are enemies, fighting over resources or territory. For example, in some stories, humans might try to colonize a planet that the Eldar consider sacred.
One benefit could be sharing of technology. The Eldar have advanced psychic and technological capabilities that humans could learn from. For example, their way of using psychic powers in a more refined and controlled manner compared to the often dangerous and unpredictable human psykers. Humans, on the other hand, have large numbers and a certain tenacity. In a fight against a common enemy like the Necrons, this combined strength could be a great advantage.
In some fanfictions, there might be a story where a human discovers an ancient Eldar artifact. This leads to an Eldar coming to claim it. Instead of fighting, they negotiate and end up on a journey together to understand the true power of the artifact. Along the way, they learn about each other's cultures and form an unlikely bond.