Brigitte/Morgan
Huh. I've been a coffee cup a few times, but I definitely spend most of my time looking human. Sometimes I'll go full typhon just to relax a little, but people tend to be more comfortable with this. If I turn into a coffee cup or a chair or a brick or whatever, it's because I need to hide in plain sight. Nobody notices a coffee cup. As for disappearances - no. We've had people suddenly appear, but no one just vanishing on us.
Morningside is just the spot we were able to fortify and keep safe most easily with the resources we had before. I'm not entirely sure that castle was even here a few days ago. Land and buildings coming and going, that happens to us pretty often.