Ah, so there was silver in his eyes. That explained the pain Silvio was afflicted by when they met. Most monsters he's met have some weakness or other. He's never encountered anything that can harm him in an instant like that. Su-jin always figured the manner in which he fed was a big enough weakness. Maybe he got lucky in that respect.

"You're safe with me," he assured. "I won't let anyone harm you while you're like this."