Marian gets the first message easily, with the hands held out. Caspian is not here. Caspian is somewhere else. Once, again, it repeats in her head. Caspian is a frog. She nodded, and gestured, hands slightly faster moving than normal, in a waved gesture to lead the way.

"Do you know how it happened? How long he's been this way?"

It seems strange that Caspian would fall under the workings of the general magic worked here.

He was on the people that warned her of everything here. But the magic did like to change in new and expected ways.
There's a seconds thought about writing this up for Security. That will wait until the problem has been handled though.