Rual'thor is a Mindflayer who lives in a house in Underdark. He occasionally works with a female Drow named Nathrae.

Spoiler: It is possible for the Princess to "enjoy" Rual'Thor's company twice or avoid him completely. If her party survives the battle with the Drow and advances through the Underdark: Battlegrounds, she will be captured because of Rual'Thor's machinations. After her escape, if she wishes to recover her equipment, or free some of her possible companions, she and Rizzen Do'Vrinn will enter Rual'Thor's Home for the second time.
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