"These spirits stole the essence of spirits, moved it to the human realm. That's why you can hurt them easily, unlike us. We need to keep killing them, we need to take that essence back!"
William initially thought the Fox spirit fell into a trap. So the best course was for him to help the Fox spirit and other allied spirits to escape. He never thought they were the ones attacking, needing to push forward, not retreat and run away.
Regardless of what the spirit essence meant or what its value was, the fact that this fight was happening in the human realm was a shocking piece of news. He knew now why his attacks were quite deadly to the spirits. He was fighting them on his turf, not theirs. They were weakened. They were vulnerable.
William had tons of questions for the Fox spirit, and yet he knew this wasn't the time to do this. He first needed to retrieve that spirit essence, then ask questions later.
