I like the duality already mentioned, and the dialogue-style stripped bare of any redundancies works very well in keeping focus on the relational-psychology. The danger is, it seems, to let it divert in a scholarly lecture on Dark Eldar conduct and background, how interesting it may be.
I thought the first two post very strong, with the Inquisitor struggling with how far across the border he can take his search for knowledge and the Eldar wavering between contemptuous silence and disloyalty to the secrecy of his race to satisfy his will to live a little while longer (for sure he must know his chances of getting out alive are slim?). Although I'm not sure, it may be the Inquisitor is stoically dragged into whatever he needs to do to gain conversation. The end justifies the means, in a dogged, insane way? On a second thought, I lean to the latter interpretation, I think.
The latest post, I found a little less. The information came too easily and dominated the post at the expense of the personages?
Good writing, anyway. Keep it up.