Castiel sensed the confusion and fear before he sensed the illness, but obviously she was someone who didn't belong. It was becoming easier to tell. Each person that arrived here was from a different place in time. Different realities...it was uncomfortable, given the fragility of time and space in and of itself - there were reasons why even Heaven was reluctant to toy with them unless no other choice was given - but he still knew that she was alone. And that he could get to her. He doubted he could be of much help, but he was close by. The park was...very calming. Even for someone like him.
Appearing behind her with the faint flapping sound of wings, he spoke up first. "Have you arrived just now?" he asked. "Or...are you simply lost?"
She was definitely ill. There was a certain scent to human ailments that he could detect. Likely respiratory, but...something else was very different. She had a soul. But it was artificial. Not created by God. He'd never believed it was possible, yet that wasn't going to deter him. No one got to choose how they would be created or what they would be used for. And she seemed...frightened.
"That has been happening a lot lately," he said, attempting to make conversation, no matter how awkward.