Castiel took a small step back when Kate aimed Pinaka at him. He hadn't meant to startle her, and he wanted her to know he didn't mean her any harm. But she lowered the bow on her own, and Castiel relaxed slightly. "There are definitely worse smelling places than Madison Valley," he said, as he offered her a small smile.
"Well, welcome back to town. I am Castiel." That was the only name he gave her, as it was the only name he had. Angels didn't tend to have surnames. Lucifer seemed to be an exception to that rule.
He studied Kate for a moment, and her bow. He still wasn't completely comfortable with the weapon, he knew she could use it on him whenever she so chose. If he gave her reason to. "I'm not going to hurt you."