Kate was supposed to leave three days after Gilles and his people appeared. Still, she stayed for the next four days until Natalie's group arrived. She didn't want to leave Billy people with those guys since he was also using the guild as an inn. So, she explained things to Natalie.
"I got it. I also think that we should be wary of them," Natalie said.
"I am cautious, but you guys are overly cautious," Billy said. "Isn't Rosalie in the same position as them? You guys were so ready to help her…"
"It is different, that old man is too rude, and the others follow all of his commands. That is why we need to be careful," Kate said before leaving.