Claims to be a ranger.
has inside information about goblin caravans.

Sandy is most probably a ranger afterall, but not very bright. She was "given" a cursed set of boots by Gene Parmesian. These boots allowed her to move silently, but lowered her intelligence considerably. Given her trusting nature, it was relatively easy for Gene to manipulate her at that point. (Perhaps the reason she "stood-up" Faelon was because she literally forgot about the date.)

It turns out that Sandy Dunston is a pseudonym for Sancha "Sandy" Tioaquen.