In the dark the heat of the creatures body can be seen quite well, though what immediately stands out are the red eyes. It appears about your size, but a bit thinner in frame. You are able to make out that in it's hand is what appears to be a short blade, but it wears no formal armor and is not moving to attack. It retreats cautiously, never offering you it's back.
"You are no Derro, what are you doing here within the Keeper's domain?" in a feminine voice. "Should you seek out my death then the Lord of secrets shall have yet another that will never leave this hallowed place."
You have seen a few of your darker cousins, the Duergar, and knew they ventured deep within the older shafts. They were very secretive about what they found and it was commonly held by many that they might be hiding something of value that they had plumbed from its depths. It was also whispered that they could be in league with those they had supposedly forsworn, falling back into a life of Immorality and evil as had their patron, the exiled son.