The angel had always been relatively attentive when it came to the Winchesters. In the beginning, he had come around whenever he pleased. Then he'd begun to come now and then when called, which had soon turned into coming every time Dean called. Of course, that turned into him ignoring them in favor of a mission, or angels, or any manner of other things.. but he'd soon come back 'round and had been very attentive. To Dean.
But here Sam was, with no knowledge of what was soon to happen to his brother, or that Castiel had promised Dean that he would look after Sam. Castiel, as expected, had taken that task very seriously, and for the last year, the angel had been treating Sam far better than he had in the last near-decade. Not that he'd ever treated him badly, but he and Dean did have a more profound bond.
Somehow, that had changed since Dean had tasked the angel with watching over his brother. Sure, he would always feel Dean and he had a different sort of connection.. but these days, to the Seraph, they were both equally as important. His Winchesters.
"You don't look different physically." Castiel agreed, eyes finally diverting from Sam's face, he didn't want to make him feel uncomfortable. "But you look different to me." It wasn't often they all discussed the differences between the Winchesters and the angel who watched over them, it wasn't like they had a lot of time on their hands, but they all knew there were distinct differences. And it was easy, sometimes, to forget the celestial being parading around in a meat suit wasn't human. It was times like this that it was glaringly obvious. "You look good, Sam." Came the final assessment, coupled with a small smile usually reserved for Dean.