Koyanskaya has recently been summoned by Chaldea to help alongside their battle to save Pan Human History, but can she really be trusted to not take advantage of her new position for her own gain? Fou doesn't seem to think so. His image of her already soured by their first violent meeting seeing her once again trying to endear herself to Chaldea's Master, a human the Beast cares quite a bit about, solidifies his plans. He'll teach that haughty assassin her place!