William was surprised at how well the masked girl was handling the situation. She was about to die, but she didn't release any groans of pain, only weakly called for help. Her eyes suggested that she was in some pain, but dying would only be an inconvenience.
She must have gone through a lot. William misunderstood.
In fact, since Fria's experience wasn't realistic like William's, she would only feel about five percent of the pain. If she could feel a hundred percent, Fria definitely would have passed out by now.
William noticed some of the nearby Cultivators rushing towards the Mummy's corpse, but he couldn't bother with them right now.