The knights from Valeria handled the monsters much easier than the supranational knights of Medeus. They were able to kill one monster to another until none remained.
Arabella thought it was far better that Sera did not see all these monster corpses and blood since she would probably be puking by now and even more traumatized.
Meanwhile, everyone was awed by the fighting abilities of Valerian knights.
The other royals who had finally gathered outside as well were further relieved that Valeria had joined the Council. Meaning, Valeria would not easily declare war on neighboring countries anymore and these monstrously strong knights were now their allies.
The monster at the top of the roof was apparently able to break the barriers there. But Icarus killed it when it jumped down into the hall. Thus, everyone was able to leave the venue with minor to no injuries.
Thus, all the monsters had indeed been eliminated.
However, that wasn't the end of the monsters.