The Vesmier tamps down on everything, bringing himself strictly under control. Only once in the last half-millennia has he lost that control entirely, and he doesn't intend to make it twice.

:: I'd be wary of leaving it under a trigger, :: he says. :: Not knowing what it is or whether it's programmed to react, however acutely or chronically, to manipulation. As loathe as I am to suggest it, the best course of action might be to place your memories of discovering it under a trigger and leave it alone for the duration of your interaction with Thane. ::