Deanna was on her feet in an instant, walking over to greet her and nuzzling Charlie's hand before the red-headed woman sat down and the dog settled back down at their feet, yawning. The angel reacted in a similar fashion.. only without the nuzzling, asking for pets, and laying down on her feet.
He did, however, lift his head and watch as she came closer. Those bright blue eyes followed her as she sat down on the bench beside him. He took into account her posture, the smile she wore, the way she sat and the place she allowed her hands to rest once she was sitting. He'd never been particularly good at reading humans (their emotions still confused him, as did their body language, but at least he was slowly getting a grip on those non-verbal cues), but he could tell she wasn't in the best of spirits. None of them were right now. Dean had gone and it was a blow to the remaining remnants of the screwed up little surrogate Winchester family.
Slowly, he went back to watching the world around him, too.
A few minutes were allowed to pass in silence before the angel finally spoke up, his folded hands tightening around one another before they loosened their grip again.
"You must miss him a great deal." It was clear who he was talking about, the angel didn't have to mention a name. "I know you were very close. He thinks the world of you." He had been devastated when Charlie had died. Both Dean and Sam had been. Castiel hadn't been present at her funeral, he wasn't a Hunter, he wasn't part of the family-- not back then. And he'd been the one to cause her death, in the end, so he'd had no right to be there.
"Are you alright?" He asked at last, finally turning his head to look at her once again.