"I truly do not." Cas mutters under his breath, hopefully too quite for the peppy boy to hear. Bringing his mood down would feel like kicking a puppy at this point. Well, happy to see him is leagues better than murderous to see him, so he'll take it. He's quick to carry on, already turning back in the direct of Mag's, hand on Jack's shoulder steering him.

"Yes, newly arrived, as I am, though I did spend some time here before." That's another story, but if it'll save him time from having to explain that he doesn't actually recognize this kid, all's the better. "I spent roughly 9 months in this world before returning home for a time."

If he's walking a little fast, that's because he's a terrible liar and he knows it. The boy knows Sam, so this can't be just another person who met the Castiel that was here for the month in between his absence that he just doesn't recognize. He's someone from home - their home - which could mean a lot of things. Usually not great things, but so far, nothing's raising any red flags.

"When did you arrive?"