Naib’s letter:

“Wild Boars are still active. Location confirmed. Departing today.”

Since Naib is experienced in war, and by extension war language, “Wild Boars” is probably code for someone or someones. My first thought is Murro but I doubt that’s the case, it’s probably about something else, since it’s most likely referring to a group of people. The “are still active” part maybe refers that their operations are still going on.

“Location confirmed” I think pretty much states that the objective was found. “Departing today”, well, pretty much they depart that day.

If you ask me, since some/most letters have to do with how the character entered the manor, and this one happens to be one of those, then I think it’s safe to assume that one of Naib’s missions was to find out what was happening in the manor, or at least why there were so many people going and disappearing in a certain unknown location which was being surveiled by them. The “are still active” probably refers to the hunters and survivors still playing the games, if my hypothesis is correct. Location being confirmed could also mean that they finally found where the manor was, and they were departing immediately.

Then, for some reason, Naib got stuck playing the game too.

What do you think about this? I’m probably wrong but it’s fun to think this could be the case.