["That's not what you meant", Sebastian thinks, but since he has no way of knowing what exactly she was going to ask about before trailing off, nor has any reason to pry (which would be a rude thing to do, besides), he tactfully doesn't comment on it or acknowledge it.]
To the best of my knowledge it is the only way one arrives. Regardless of what one was doing prior, and no matter how impossible it might seem that one could be so taken away so completely without consent [like, say, if one is a powerful magic user. or a demon]... suddenly, everyone finds themselves here with no say in the matter.