Amos doesn't have a communicator of his own, so it's probably lucky for both of them that he's walking back towards his room to switch out a few tools before he goes back to Terezi and trying to make the food nicer. He hears Alex's voice from a corridor away, and rushes over, reaching out to hold onto Alex's jumpsuit at the shoulder, eyes wide.

"Hey, hey, I'm here, I'm fine, what's up?"