[Sabriel indeed has no worries of Xavier forcing her into literally anything. That would be patently against his programming in most cases, in fact.]

I do not know much. At a guess, it is less than four or five miles in diameter. It appears to be surrounded by water on at least three sides. It contains-- [Yeah, he's going to go through a... surprisingly thorough list of information? Xavier has been walking all over hell and gone looking for Pieces, after all.]

Of dangers, I have not specifically reached any, although there is a path with a notation to not turn around. Doing so resulted in a complete immobility of my non-critical processes. There was a presumed visual hallucination of an indistinguishable individual, who drew closer over time, following a statement of their disappointment.

I have not found any way to leave, but I have not explored the entirety of this place yet.