There's also a theory about the demonologist: perhaps he was blocked, which is why he didn't kill anyone. Judging by the news, Ple-Sen didn't spend the night alone, and he might have been the blocked demonologist. On the other hand, the unfortunate guy who was killed by the demonologist could have been healed by our kind doctor (priest), and Ple-Sen simply spent the night with a pretty girl and bragged about it. In short, it seems they've already decided who to execute today, and let Ple-Sen try to prove his loyalty to the castle tomorrow :)
Bow down and hear our cry,
Our earthly rulers falter,
Our people drift and die,
The walls of gold entomb us,
The swords of scorn divide,
Take not thy thunder from us,
Take away our pride.
G.K. Chesterton: English Hymnal