Dark Elves/Drow tend to inhabit the Witchlands, where they trade with the other regions for various minor magical items (potions, everburning torches) and mostly keep to themselves. A few hundred or so years ago, they did have a bit of a war with the Jade Empire, which resulted in the Hellmouth forming. And before that, they were known to raid neighboring lands for slaves. The Poncy Knights region (where Brighvale is) tends to look down on them however, since they're all about no-magic and purity of humans. Brightvale is far enough in the boonies on the coast that the knights don't tend to give them too much trouble, along with the fact that Brighvale is recognized as it's own territory.<br/><br/>So Fridda disguising herself as a normal elf to move through the region would make sense (the knights don't like witches or elves and dark elves would just set them off in all the wrong ways)