system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40k] Are there Khornate/Nurglite/Tzeentichian Eldar?
gpt
The others here are actually incorrect, though it's not something that is widely published. There ARE Chaos Eldar, and the God they favour depends on the individual. When they die, it's up to their patron to fight for their soul, but the whole point of serving Chaos is to try not to die. 

Eldar Souls are exceedingly valuable to the Chaos Gods, because they basically taste the best. They remain conscious, so continue to generate emotion and experience after death, and Slaanesh's automatic claim on the overwhelming majority means the other gods relish the opportunity to nom down. 

As such, in order for an Eldar to survive such an arrangement is to be very, VERY good at killing. The sheer weight of souls they send their patron has to outweigh their own value, usually by many times over. Because of this, the Eldar that survive as Champions of Chaos are amongst the most powerful and deadly. They almost always work alone or as temporary allies of others, as they have a tendency to kill everyone around them to keep their patron appeased.

The only known, named Chaos Eldar is Araha, believed to he dedicated to Khorne.