Traitors? for what? or the scum classmate of them on the previous chapters are the one who reported they were bait the monster to attack the fort?
One of the flaw of a development like this was that, it let us think that the nobles and commanders are really stupid for not having a process to interrogate first the suspect, but instead it let through to their belief that something feasible was the right answer after all, even though its total non sense
Though Its already talked on the previous chapter, but what happened on this scene was that they should only the people on the hall fighting the monster and all soldiers are out in the open field to sortie out to defend the fort.
What puzzled me, whom reports about them? My instinct tells me that their scum classmate on the previous chapter are the one who reported it.
Or maybe, its Silane herself because her spirit only reports to her the location of the monsters and the soldiers rush in accidentally witnessing MC using his tamed monster.
Or, the soldiers are already brief that there are monster pretended to be a human before rushing it. They are arresting all of them and because they dont know who was it specifically.