[ There is genuine surprise in Ferdinand's eyes when he sees his professor, as well as relief. He had thought himself to be completely stranded, but for some reason, seeing the instructor that he regards as such an important figure in his life makes him feel reassured, as if things will be alright.

So much so that he almost forgets about the turbulence, about to unbuckle his seat belt to get up and properly greet him when the same jitter that sends Byleth into the vacant seat next to him presses him hard into his own chair, causing a rather worried look to cross his face for a brief moment. ]

Professor! That's correct, I spent three days with some other people before these Moon Knights rescued us. I had thought myself completely lost, but if you're here, then I will see that as a sign of providence!

[ Assuming they survive this ride, that is. ]