The Drow are a sort of sore topic for the elves of Faerie. While the prevailing theory is that all elves in all worlds are descended from the elves of Faerie… when it comes to the Drow, there are quite a few elves who would rather not admit any relation, however distant. Not necessarily because the Drow are EVIL (the Fae have rather different views on good and evil, after all), but because they worship a spider-god, of all things.
Lady Vidia doesn’t care too much about these things, not when a visiting Drow named Elkantar can make such an impressive fountain.