Okay, better take a look at the default options here...
[ ] Our main priority is defending Van Hal. Hole up somewhere defensible and wait for the rest of the Greatsword cohort to return.
[ ] Our main priority is defending the leadership of Stirland. As above, but also find a way to get a message to Wilhelmina, telling her to seek safety.
[ ] Act natural. Investigate the two infiltrators you know about and hope none of the infiltrators realize they've been detected.
[ ] We only have a limited amount of time to act. We must round up the infiltrators now. (write in how)
[ ] Close the gates. Nobody in, nobody out. Not until we get to the bottom of this.
Acting natural is out because Berthold being knocked out in plain view of everyone certainly let the whole castle know that
something is going on. Acting natural would if anything be more suspicious, not less; it's expected that the Count would take action over it.
That said, from the perspective of a random infiltrator, what do they know has happened? We took out the guy we were interviewing
and what appears to have been his backup, and it's only been a few minutes, so not that. What they know is that one of the Count's new martial advisor prospects was attacked- maybe assassinated. They know that
they didn't do it, and they probably even know it wasn't one of their accomplices either. At this point they can say "clearly any assassin will trigger an investigation which will blow my cover; I'd better move" or "I have nothing to do with this; stick to my cover and let them chase down the culprit".
If we have a large number of infiltrators, they have multiple types (i.e. some are normal humans and some are inhuman monsters), or they come from multiple different organizations (some are Von Carstein, some are more mundane, etc.) it's likely that we will see
both decisions made at least once. If we don't move to protect our vulnerable points, they'll get hit; if we don't seal the gates, at least some infiltrators are likely to do their business and escape. No idea how we would even begin rounding them up in a way that would actually work for multiple infiltrator profiles, so that's out too.
I am honestly not that concerned about Van Hal's personal safety as he's a badass who is now accompanied by at least one further badass and whatever the infiltrators choose to do, it's unlikely that they will be able to assemble more than a handful of agents at once when they
didn't plan to set this off. If they want to kill him, "let's charge at him when he's in full witch hunting mode" is possibly the worst way to do it because the man is part of a profession who often work on the basis of "poke cult nest with stick, murder cultists who emerge". At the same time, that can't be said of everyone, and we can't afford to lose any advisors.
So it seems to me that we want to seal the gates (on the pretext of hoping to catch our "assassin")
and get key personnel on alert/into areas with multiple armed friendlies. We're short on troops to play bodyguard and hold the gates at the same time but even just having two advisors in the same room makes both of them a lot safer. They can join Van Hal's witch hunting team, do whatever else they find critical in a team of their own, or wait by the gates with the greatswords that we do have.
So something like...
[ ] Close the gates. Nobody in, nobody out. Not until we get to the bottom of this.
-[ ] Get all key personnel (Wilhemina, Kasmir) alerted so they can't be caught alone and killed once the infiltrators catch on.
-[ ] Berthold was me. I may have panicked and tried to attract Marcus' attention with a Magic Dart. I am not accustomed to running around in my underwear alright.
Opinions on this?
We do in fact still have a probably-living infiltrator locked in a room.
Yeah, if she's got inhuman speed/strength she'll probably be able to batter down the door and leave when she wakes up.