Arrogance
The organisation had little regard for the lives of the Claymores. After all, such creatures were easily replaced.
They had always known there would be casualties in that fight. How could there not be when they were going up against Teresa of the Faint Smile?
But even they had to admit they made a mistake that day. It shocked even their highest that they hadn't seen it coming. Irene, Sophia, Noel. Their deaths could have been avoided if the organisation had taken a short break from there arrogance rethink their plans.
It was a dangerous mission that required experience and strength both physical and mental. They should have known not to send a rookie. Especially one as unstable as Pricilla.
She was still a child. And like a child she hated to lose. Unexperienced, and with no idea of her limits she was put up against an opponent she couldn't beat on her own. Anyone could have seen she was a ticking time bomb. A catastrophe waiting to happen. But they were blinded by her potential, her raw power.
The organisation could have had the most powerful worrier the world had ever seen. Instead they lost the five greatest it already had.