Interestingly, my first reaction to her was that she looks very similar to what I'm expecting the Norse goddess associated with things like intelligence, wisdom, and/or knowledge to look like. You know, the one who will eventually become
Eraqus's grandmother. Even the dog collar she is wearing sort-of matches: Of course I could never have predicted that particular detail, but some kind of visible weird quirk definitely is expected.
And of course, being Eraqus's grandma doesn't exclude her from being Xehanort's one as well...