A theme that often shows up is redemption. Maybe a Krieg soldier has a chance to change his or her ways through interaction with the Eldar. Or perhaps an Eldar character helps a Krieg unit see a different perspective. There is also the theme of forbidden love. The two races are so different that a relationship between them would be seen as taboo in the Warhammer 40K universe, and this can create a lot of drama in the fanfiction.
One common theme is the clash of cultures. The Krieg, being from a very militaristic and rigid society, and the Eldar, with their ancient and often mysterious ways, make for an interesting contrast. Another theme could be cooperation against a common enemy. Sometimes they are forced to work together in fanfictions, which leads to a lot of character development and exploration of their different abilities.
The theme of redemption can also be present. Maybe Krieg has a past he wants to overcome, and Lilith helps him in that journey. Or vice - versa. Their relationship becomes a catalyst for personal growth in these types of fanfictions.
One common theme is cultural exchange. Since the Eldar and humans are very different, exploring how they learn from each other's cultures, like the Eldar's advanced psychic abilities and humans' tenacity, is often a big part of these stories.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, and you can simply search for 'Krieg x Eldar' there. Another option is FanFiction.net, which also has a wide range of works. Just be sure to use the search function effectively to narrow down your results.
A common theme is loyalty. Since they are often comrades in the original context, fanfictions explore how they remain loyal to each other through different trials. For example, in some stories, they don't abandon each other even when facing seemingly impossible odds.
One common theme is cultural exchange. Since humans and eldar have very different cultures, it's often explored how they learn from each other in these fanfics. For example, in many stories, humans might be introduced to eldar art forms or spiritual beliefs, and vice versa.
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 common theme is sacrifice. The Death Korps are known for their willingness to sacrifice themselves for the greater good. In fanfictions, this often plays out in dramatic battles where they hold the line at all costs.
One common theme is cooperation against a greater threat. In many fanfictions, there's a powerful enemy like a chaos invasion or a new alien species that forces the Eldar and humans to put aside their differences and work together.
One common theme is the clash of cultures. The Eldar and humans have very different ways of life, beliefs, and values. This often creates tension and misunderstandings at the start of the relationship, but also provides a rich backdrop for the development of their love as they learn to bridge the gap.
Survival in a cut - throat environment is also a theme. In Commorragh, the dark eldar city, it's a dog - eat - dog world. Everyone is out for themselves. A story could be about a low - level dark eldar trying to survive the constant threats from stronger individuals, while also trying to climb the social ladder.