The NPC "Tyrana Slil" in Highkeep was killed prior to the beginning of the Battle for Kithicor as referenced in ingame lorebook "Bloody Kithicor: Nurgal's Stone Vol. V". Yet she appears to be alive and well in Highkeep long after Kithicor Forest's conversion to the undead night variety. The game is literally unplayable in its current state and I think this requires a hotfix before the weekend is over.
She may have become a vampire or walking Dead, or she may be another person with the same surname and same name.