Tyaethe Radistirin
If there was a power that it was now certain that the vampire didn't have in any capacity, it was the ability to cut through things by staring hard enough at them; both Gillian and Alette still had completely intact heads. Yes, they were just dealing with a hole in reality that would kill anyone who so much as touched it, but this ridiculous client confidentiality was so important... because it wasn't as if it was the utmost importance to find where this had come from so they could determine a motive or even who was keeping secrets.
Of course, if it was something that powerful and that evil, completely unshielded by magical means, then there was possibly a way to tell if it was here without turning over every last room in the fortress looking for a bit of not-metal...
Although she appeared to be just looking at her umbrella now, Tyaethe was facing in the vague direction of the sun. Maybe she'd get an answer, maybe not, it might take a while to tell.