William got his reasons. While she was trying to convince him that everything was alright, he spread his spirit sense and noticed the presence of monsters in the heart of these hills.
"This reminds me of the Scarlet Bears," he didn't recognise the type of the monsters in the heart of this place. They looked like cats, big in size, with thick fur like foxes. He didn't know what was with furs, but he cared more about how these monsters acted as if they were entrapped inside that place.
"Wait here," he didn't want to carry a dead weight over his shoulders when he expected a big battle, "don't come forward, no matter what," he didn't wait for her to say anything, and changed directly into his spirit form.
Since he stepped into this world, and something seemed to stir up his dormant snake spirit. He didn't know if this was a good or bad thing, but at least his fox spirit was now merging with the snake with each time he transformed.